Math, asked by ganesh4656, 6 months ago

using suitable identity to get the product of (7a-9b)

Answers

Answered by ushabandari50

0

(7a-9b) (7a-9b) =(7a-9b)square

=(7a)square-2(7a)(9b)+

(9b)square{(a-b)square=asquare-2ab+b2}

=49a2-126ab+81b2

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