solve question 15
Please find below the link of similar query as asked by you :
15 ( i ) https://www.meritnation.com/ask-answer/question/one-of-the-factors-of-a2-b2-c2-d2-4abcd-isa-ac-bd-b/factorisation/8653257
15 ( ii ) https://www.meritnation.com/ask-answer/question/factors-of-4x2-y2-2x-2y-3xy/polynomials/7661273
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15 ( i ) https://www.meritnation.com/ask-answer/question/one-of-the-factors-of-a2-b2-c2-d2-4abcd-isa-ac-bd-b/factorisation/8653257
15 ( ii ) https://www.meritnation.com/ask-answer/question/factors-of-4x2-y2-2x-2y-3xy/polynomials/7661273
Do let us know in case of any further concerns .