问题
解答题
计算: (1)(-ab)6÷(-ab)3; (2)x10÷x8•x2. (3)(
(4)(4x2+2x)÷2x-2x(1-x). |
答案
(1)(-ab)6÷(-ab)3
=(-ab)3
=-a3b3;
(2)x10÷x8•x2=x4;
(3)(
x2n+3-2xn+3)÷(-3xn+1)=-2 3
xn+2+2 9
x2;2 3
(4)(4x2+2x)÷2x-2x(1-x)
=2x+1-2x+2x2
=2x2+1.