Question

5(a+b)^2+23(a^2-b^2)-10(a-b)^2分解因式

Answer 1

5(a+b)^2+23(a^2-b^2)-10(a-b)^2

=5(a+b)^2+23(a+b)(a-b)-10(a-b)^2

5 -2

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1 5

=[5(a+b)-2(a-b)][(a+b)+5(a-b)]

=(3a+7b)(6a-4b)

=2(3a+7b)(3a-2b)