因式分解(3a-4b)(7a-8b)+(11a-12b)(7a-8b)要过程
问题描述:
因式分解(3a-4b)(7a-8b)+(11a-12b)(7a-8b)
要过程
答
=(7a-8b)[(3a-4b)+(11a-12b)]
=(7a-8b)(3a-4b+11a-12b)
=(7a-8b)(14a-16b)
=2(7a-8b)²