题目内容
计算:
(1)15x+4x﹣10x;
(2)﹣p2﹣p2﹣p2;
(3)x2y﹣3xy2+2yx2﹣y2x.
(1)15x+4x﹣10x;
(2)﹣p2﹣p2﹣p2;
(3)x2y﹣3xy2+2yx2﹣y2x.
解:(1)15x+4x﹣10x=19x﹣10x=9x;
(2)﹣p2﹣p2﹣p2=﹣3p2;
(3)x2y﹣3xy2+2yx2﹣y2x=3x2y﹣4xy2.
(2)﹣p2﹣p2﹣p2=﹣3p2;
(3)x2y﹣3xy2+2yx2﹣y2x=3x2y﹣4xy2.
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