Question

The value of ( a + b)2 – ( a - b)2 is
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Answer 1

Answer:

4ab

Step-by-step explanation:

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

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

by using these equations

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

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

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

a^2 - a^2 will be cancelled

b^2 - b^2 will be cancelled

so

2ab + 2ab = 4ab