1.

(a) Find the square of (4x2 – 7y2 ) using an appropriate identity.

Answer» ONG>ANSWER:

a2-b2=(a+b)(a-b)

a=4x, b=7y

(4x+7y)(4x-7y)

16x2-28xy+28xy- 49y2

16x2-49y2



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