Question

factorisation method : a^2 b^2 + 8 ab - 9

Answer 1

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Answer 2

howdy!!

your answer is -----
we have ,

${a}^{2} {b}^{2} + 8ab - 9 \\ = {a}^{2} {b}^{2} - ab + 9ab - 9 \\ = ab(ab - 1) + 9(ab - 1) \\ = (ab - 1)(ab + 9)$



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