Question

yaar explain caro answer to 4ab hai.​

Answer 1

Answer:

The value of the expression is 4ab.

Step-by-step explanation:

The expansion of (a + b)² is:

$(a+b)^{2}=a^{2}+2ab+b^{2}$

And the expansion of (a - b)² is:

$(a-b)^{2}=a^{2}-2ab+b^{2}$

Then the difference between (a + b)² and (a - b)² is:

$(a+b)^{2}-(a-b)^{2}=a^{2}+2ab+b^{2}-a^{2}+2ab-b^{2}=4ab$

Thus, the value of the expression is 4ab.

Answer 2

Answer:

(a+b)^2 = a^2+b^2+2ab

(a-b)^2 = a^2+b^2-2ab

after simplifying the brackets

a^2 + b^2 +2ab - a^2 - b^2 +2ab

(a^2 - a^2) + (b^2 - b^2) + (2ab + 2ab) = 4ab

because a^2 -a^2 = 0

and b^2 - b^2 = 0

Step-by-step explanation: