To simplify this, frist we have to open bracket by multipling, i.e;  (a  +  4) (a  -  5 ) = a(a  -  5)  +  4( a  -  5) = a.a  -  5.a  +  4.a  -  4.5 = a2 .....

(3y - 1) (5y - 2) Now expanding the terms we get;      At first, multiply (5y - 2) with '3y' i.e.  3y (5y - 2) and then with 'y' i.e. 1 (5y - 2)  ​​​​​​​ 3y (5y - 2) - 1(5y - 2)   .....

(a + b) (a - b) Now expanding the terms we get; At first, multiply(a - b) with 'a' i.e. a(a - b) and then with '2' i.e. b(a - b) a(a - b) + b(a - b)     a2 - ab + ab - b2     a2 - .....

( 3x - 2y) ( 3x - 2y) Now expanding the terms; At first, multiply ( 3x - 2y) with '3x' i.e. 3x( 3x - 2y) and then with '2' i.e. 2y ( 3x - 2y)    3x(3x - 2y) - 2y(3x - 2y)    9x2 - 6xy -6xy + 4y2   .....

 (2a - 3b) (2a + 3b)  Now expanding the terms;   At first, multiply (2a + 3b) with '2a' i.e.  x (2a + 3b) and then with 'y' i.e. 3b (2a + 3b)     2a(2a + 3b) - 3b( 2a + 3b)    .....

 (x - y) (x + y) Now expanding the terms; At first, multiply (x + y) with 'x' i.e.  x (x + y) and then with 'y' i.e. y (x + y)    x (x + y) - y(x + y)     x2 + xy - xy - y2    .....

Here to prove it, we can start from LHS and reduce it in RHS. Here we have to convert sinA in to cosA  So, we need formula, cos2A=1-2sin2A or, sin2A=(1-cos2A)/2 Now take LHS, LHS=Sin⁴ A =  (sin² A)² Replace value of sin2A .....

bank a/c .......................dr  2,40,000    to share application a/c   2,40,000 Being application money received on 80,000 shares @ Rs 3 per share ) share application a/c ....................dr   2,40,000    .....

As a result, a new plants is created. This method of growing new plant is called simple .....

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You mean 4COS22A-1 =(2COS2A)2-12? 4=22  and I wrote whole squre of 2 and .....

We know,relation between cos and sec is

SECX =1/COSX

SO

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You can write based on following points: Discipline is necessary to strive what you want in your life. Think...What one could achieve without discipline? Can s/he able to properly complete any sort of work? Definitely not.  Without .....

For students, studying english could be a big help in many ways. It benefits our lives by improving our knowledge, helping us to improve our grammar and be more confident in communication.  In addition, English language helps you to get job .....

You may see the furniture, clothes, books and copies, pencils, water in a bottle or jug and so on.  Furniture is made of wood.  Books and copies are made of paper.  Pencils are made of wood and graphite.  Bottle or jug is .....

सर्वनाम पाँच प्रकारका हुन्छन् । पुरुषवाचक सर्वनाम = म, तिमी, उनी (पुरुष वा स्त्री दुवैलाई .....

According to this table, South Africa is the strongest team of cricket in ODI .....

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So, the chemical reaction becomes Fe + O2 → FeO You can see that In reactant side, there are two oxygen atoms and  in the product side, there is only one oxygen atom. To get equal number of oxygen atoms in the equation, we need .....

You might have learnt about chemical. Calcium hydroxide - Ca(OH) 2 Carbon dioxide - CO2 Ammonium chloride - NH4CL Calcium carbonate - .....

g. Fe2O3 h. FeO i. FeCl2 j. K2SO4 k. NaNO3 l. CO2 m. CO n. .....

Elements of group 0 are called noble gases or inert gases. These elements have stable arrangements of electrons in their outermost shell.  Atomic structure of Neon.  The chemical reactivity of a group .....

It is H2O. You can see it is formed by two parts of hydrogen and one part of oxygen. And compound are those molecules which are formed by the combination of two or more than two atom. So, water is called .....

Look at the above figure. What do you see inside the nucleus of Calcium? You can see 20  Protons and 20 Neutrons. You may know that neutron is chargless and proton is positively charged. So, the atom is centrally positive .....

Radicals show positive or negative charge.  While, the compounds do not show any charge.  Radicals have their combining capacities, that is, the valencies.  Compounds do not have .....

You know, group is a vertical column of elements in the periodic table.  While, valency is the combining capacity of an element or a radical.  In general, the elements of the same group have the same .....

If you want to know more about other two movements ; Jana Andolan and Loktantra Andolan, then please let me .....

Look at the above periodic table. What do you see? You can see elements are arrnaged on the basis of their increasing atomic number. And chemical and physical properties are also seperated on that basis. So, the law of modern periodic table .....

 विद्धानहरुले विभिन्न धारणाहरु व्यक्त गरेका छन् ः अनुभूतिको स्वस्फूर्त अभिव्यक्ति नै .....

This is the experimental verification asked by the given .....

Maybe doctor Braun realized what had happened, hadn't he? The woman said she had died three months ago but the girl had gone to make a house call.  Perhaps doctor was very much amazed with this .....

What was the nature of the doctor?  Was he kind or unkind? And next thing, he had seen the girl coming for house call but here the woman said he she had passed away 3 months ago.  Isn't it mysterious for .....

Doctor Braun was impressed by the girl so he interrupted and the woman couldnot complete the .....

VY Canis Majoris is the biggest known star in the universe.  Its radius is 2600 times greater than that of the sun.  It is about 1.75 x 1010 times larger than the sun by .....

The presence of high percent of rust gave The surface of Mars red-like appearance. So when Mars is observed from space, It looks like a red .....

Look at the above figure of the solar system. Do you see the mercury? Where it is located? It is located close to the sun. i.e. inside the asteroid belt. So, mercury is called inner .....

There are 88 defined constellations in the sky.

Large and prominent constellations include Orion, Ursa Major (and its asterism, the Big Dipper - arguably the most famous star pattern of all), Crux (the southern cross found on many flags .....

Yes, the sun is 150 million (or 15 crore) kilometres far from the earth.  Astronomical Unit (AU) is a unit based on the distance between the sun and the earth.  The distance between the sun and the earth is 1 .....

You know the sun is about 15 crore kilometers far from us.  Still, we feel the rays of the sun hot enough here on the earth.  Thus, we can easily imagine that, the sun is very hot.  The temperature at the core reaches .....

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As mass and weight of an object are not same things. Mass is always constant, as weight (w= m⨉g) may vary according to gravity. For example, Your weight will be will be less in the moon, as the gravity of the moon is less than that of .....

You know, calorie is the unit of energy (especially heat).  We measure the energy that a food can supply us in calorie per gram.  80 calorie per gram of a solution means 1 gram solution of that substance can supply 80 calorie of energy .....

Why do doctors want to know the detail? Most probably to help for .....

So, we can write velocity as the product of distance and frequency. velocity = distance × frequency Or, distance = velocityfrequency For a wave, velocity is generally represented by c and  distance is represented by lambda .....

Was she a spirit of a girl who had died three months ago? You can understand this by the way she led the doctor to the place where her mother was sick in .....

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Her skin was abnormally light. Her eyes seem looking through. He probably means he was different form common human being. Isn't it also because of the time she visited the .....

Not really but she wanted 'ame' and for this only  How many days did she come? and what .....

Here, the cost of 20 apples  = Rs. 100 Now, to find the cost of 12 apples. First lets find the cost of 1 apple. The cost of 1 apple = Rs. 100 / 20    We divide by 20 because the cost of 1 apple is surely less than the cost of 20 .....