Question

Using identity : (2x+5)(2x+5)- (2x+5)(2x+5)

Answer 1

Answer:

(2x+5)^2 -(2×-5)^2

4×^2+20×+25-4×^2+20×-25

40x

Answer 2

Answer:

(2x+5)(2x+5)-(2x+5)(2x+5)

(2x+5)2 - (2x+5)2

(a+b)2 = a2 + 2ab + b2

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

+ (5)2

=/= 4x2 + 20x + 25 - 4x2 + 20x + 25

=/= 40x + 50.

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40x + 50 is your answer.

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HOPE IT HELPS YOU.

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THANKS.

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