问题
解答题
化简: (1)(9x2-3+2x)+(-x-5+2x2) (2)
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答案
(1)原式=9x2-3+2x-x-5+2x2
=11x2+x-8;
(2)原式=
x-6x+2y2-1 2
x+y23 2
=3y2-7x.
化简: (1)(9x2-3+2x)+(-x-5+2x2) (2)
|
(1)原式=9x2-3+2x-x-5+2x2
=11x2+x-8;
(2)原式=
x-6x+2y2-1 2
x+y23 2
=3y2-7x.