Post by today's evidence of the algebra's evidence. Through this, tuners can easily understand how these formulas come. I will continuously post these sources with Inshallah. So that you do not have to memorize your formula. I'll just give the technique. You can easily beat this technique.
Before posting I am excited by my teachers for this educational post. For them I can write these techniques for you.
In order to learn mathematics, you have to take care of three things:
Why is it
How are you
Why is it?
If you have these 3 questions you can learn mathematics. Let's go about today.
Class formula
Sun-1 (a + b) 2 = a2 + 2ab + b2
Proof- (a + b) (a + b) = a.a + ab + b.b + ab = a2 + 2ab + b2
Logical evidence - you think that class 10 will ... 102
Its value will be 100.
If you add or subtract 10 with any number, you can make the following:
(9 + 1) is = 10 or (5 + 5) = 10. Hold 9 = a, 1 = b
Apply that formula (a + b) 2 = (9 + 1) 2 = 92 + 2 × 9 × 1 + 12 = 81 + 18 + 1 = 100
Again (a + b) 2 = (a-b) 2 + 4ab = a2-2ab + b2 + 4ab = a2 + 2ab + b2
Then the 1st argument is proved.
Thus: the formula-2 (a + (- b) 2 = a2 + 2a (-b) + (- b) 2 = a2-2ab + b2
If you add or subtract 10 with any number, you can make the following:
(11-1) = 10 is or (12 - 2) = 10. Hold 11 = a, 1 = b
(a-b) 2 = (11-1) 2 = 112-× × 11 × 1 + 12 = 121 -22 + 1 = 99 + 1 = 100
Again (a-b) 2 = (a + b) 2-4ab = a2 + 2ab + b2 -4ab = a2-2ab + b2
The second source proved.
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