Question

a4b4-a2b4-a4b4 by a2b2​

Answer 1

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${a}^{4} {b}^{4} - {a}^{2} {b}^{4} - {a}^{4} {b}^{4} \: \: \: by \: \: \: {a}^{2} {b}^{2} \\ = {a}^{2} {b}^{2} ( {a}^{4} {b}^{4} - {a}^{2} {b}^{4} - {a}^{4} {b}^{4}) \\ = {a}^{6} {b}^{6} - {a}^{4} {b}^{6} - {a}^{6} {b}^{6} \\ = - {a}^{4} {b}^{6}$