计算:(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x³-3x²+2)
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 21:06:07
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计算:(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x³-3x²+2)
计算:(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x³-3x²+2)
计算:(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x³-3x²+2)
(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x³-3x²+2)
原式=-x³-3x²+7x-8-3x³+2x²+5x-4+x³+3x²-2
=(-x³-3x³+x³)+(-3x²+2x²+3x²)+(7x+5x)+(-8-4-2)
=-3x³+2x²+12x-14
原式=-x³-3x²+7x-8-3x³+2x²+5x-4+x³+3x²-2
=-3x³+2x²+12x-14