(3a-2)[4a²+(2a-b)(-2a-b)]

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/28 23:22:30
(3a-2)[4a²+(2a-b)(-2a-b)]
x){8QH3$QZ[(Q7ISCL$V_`gCYO?oR7I(4 "MSh2V6 & Q'A6yvPoـ9PwC~O'YP_%j< h^Ѕ;PjCP:

(3a-2)[4a²+(2a-b)(-2a-b)]
(3a-2)[4a²+(2a-b)(-2a-b)]

(3a-2)[4a²+(2a-b)(-2a-b)]
原式=(3a-2)[4a²+(-b+2a)(-b-2a)]
=(3a-2)[4a²+(-b)²-(2a)²]
=(3a-2)(4a²+b²-4a²)
=b²(3a-2)
=3ab²-2b²

原式=(3a-2)[4a²-(2a-b)(2a+b)]
= (3a-2)[4a²-(4a²-b²)]
=(3a-2)b²
=3ab²-2b²