(3a-4b)(5a-6b)+(7a-8b)(5a-6b)分解因式得

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(3a-4b)(5a-6b)+(7a-8b)(5a-6b)分解因式得(3a-4b)(5a-6b)+(7a-8b)(5a-6b)分解因式得(3a-4b)(5a-6b)+(7a-8b)(5a-6b)分解因

(3a-4b)(5a-6b)+(7a-8b)(5a-6b)分解因式得
(3a-4b)(5a-6b)+(7a-8b)(5a-6b)分解因式得

(3a-4b)(5a-6b)+(7a-8b)(5a-6b)分解因式得
(3a-4b)(5a-6b)+(7a-8b)(5a-6b)
=(5a-6b)(3a-4b+7a-8b)
=(5a-6b)(10a-12b)
=2(5a-6b)^2