If the product of a simple binomial x+m and a quadratic(x-1)
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If the product of a simple binomial x+m and a quadratic(x-1)²is a cubie multinomial x³+ax+b,then,a=( ),b=( ),m=( )
翻译该题:
如果一个一次二项式 x+m 和 一个二次方程式 (x-1)²的乘积 是一个三次方程式 x³+ax+b,那么,a=(),b=(),m=().
不用我解答了吧?两个式子相乘,展开,把x,x²,x³的系数和常数两边一对比,列一组方程式,结果就出来了.答案是a= -3,b=2,m=2
如果一个一次二项式 x+m 和 一个二次方程式 (x-1)²的乘积 是一个三次方程式 x³+ax+b,那么,a=(),b=(),m=().
不用我解答了吧?两个式子相乘,展开,把x,x²,x³的系数和常数两边一对比,列一组方程式,结果就出来了.答案是a= -3,b=2,m=2
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