多项式3x²+2x²-5x-m与多项式8x²-3x+5的和不含常数项,则m等于
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![多项式3x²+2x²-5x-m与多项式8x²-3x+5的和不含常数项,则m等于](/uploads/image/z/696038-14-8.jpg?t=%E5%A4%9A%E9%A1%B9%E5%BC%8F3x%26%23178%3B%2B2x%26%23178%3B-5x-m%E4%B8%8E%E5%A4%9A%E9%A1%B9%E5%BC%8F8x%26%23178%3B-3x%2B5%E7%9A%84%E5%92%8C%E4%B8%8D%E5%90%AB%E5%B8%B8%E6%95%B0%E9%A1%B9%2C%E5%88%99m%E7%AD%89%E4%BA%8E)
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多项式3x²+2x²-5x-m与多项式8x²-3x+5的和不含常数项,则m等于
多项式3x²+2x²-5x-m与多项式8x²-3x+5的和不含常数项,则m等于
多项式3x²+2x²-5x-m与多项式8x²-3x+5的和不含常数项,则m等于
∵3x²+2x²-5x-m与多项式8x²-3x+5的和不含常数项
∴-m+5=0
m=5