(4a-5b)²-2(4a-5b)(3a-2b) 计算

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(4a-5b)²-2(4a-5b)(3a-2b) 计算

(4a-5b)²-2(4a-5b)(3a-2b)
=(4a-5b)[(4a-5b)-2(3a-2b)]
=(4a-5b)(10a-b)