(ab+b)²−(a+b)²因式分解
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(ab+b)²−(a+b)²因式分解
(ab+b)²−(a+b)²因式分解
(ab+b)²−(a+b)²因式分解
(ab+b)²−(a+b)²
=[(ab+b)−(a+b)][(ab+b)+(a+b)]
=(ab+b−a-b)(ab+b+a+b)
=(ab−a)(ab+a+2b)
=a(b−1)(ab+a+2b)