Question

please answer this immediately fast question (2x+5)²- (2x-5)²

in the method of (a+b) (a-b) =a²-b²​

Answer 1

Answer :- (2x+5)²- (2x-5)² = 40x

Explanation :-

(2x+5)²- (2x-5)²

This expression is in the form of a^2 - b^2 which is equal to (a+b)*(a-b)

Here, a = (2x+5) and b = (2x-5)

Now solving it in the form of (a+b)*(a-b)

= (2x+5+2x-5)*[(2x+5)-(2x-5)]

= (4x)*(2x+5-2x+5)

= (4x)*(10)

= 40x

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