问题
解答题
计算. (1)(-2)2-(-
(2)(-2x)2+(6x3-12x4)÷x2. |
答案
(1)原式=4+2-2-2502
=4-2
,502
(2)原式=4x2+(6x3-12x4)×1 x2
=4x2+6x-12x2
=6x-8x2.
计算. (1)(-2)2-(-
(2)(-2x)2+(6x3-12x4)÷x2. |
(1)原式=4+2-2-2502
=4-2
,502
(2)原式=4x2+(6x3-12x4)×1 x2
=4x2+6x-12x2
=6x-8x2.