(3a+2b)(6a-5b)(2b-3a)(5a+6b)
问题描述:
(3a+2b)(6a-5b)(2b-3a)(5a+6b)
利用平方差公式来计算,
答
(3a+2b)(6a-5b)(2b-3a)(5a+6b)
=(2b+3a)(2b-3a)(6a-5b)(6a+5b)
=(4b²-9a²)(36a²-25b²)
=369a²b²-100b^4-324a^4