(1)计算:(x﹣1)(x+2)(2x﹣1);
(2)分解因式:2ab2﹣6a2b2+4a3b2.
解:(1)原式=(x2+2x﹣x+2)(2x﹣1)
=(x2+x+2)(2x﹣1)
=2x3+2x2﹣4x﹣x2﹣x+2
=2x3+x2﹣5x+2;
(2)原式=2ab2(1﹣3a+2a2)
=2ab2(1﹣a)(1
计算:
9米=____厘米