Math, asked by zil2192002, 1 month ago

evaluate using suitable identity :- (2a+7)(2a-7)

Answers

Answered by agrawal2211
1

Answer:

4a2 - 49

using identity (a2-b2)

Answered by madiha78692pvt
2
Using third identity : ( a^2 - b^2 ) = (a+b) ( a-b )

(2a)^2 - (7)^2
-> 4a^2 - 49


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