因式分解:25(2a-b)(2a-b)-9(a-2b)(a-2b)
问题描述:
因式分解:25(2a-b)(2a-b)-9(a-2b)(a-2b)
答
=[5(2a-b)+3(a-2b)][5(2a-b)-3(a-2b)]
=(10a-5b+3a-6b)(10a-5b-3a+6b)
=(13a-11b)(7a+a)
答
=(13a-11b)(7a+b)