3x的平方-5x-2分之5x+11=x-2分之m-3x+1分之n求mn

问题描述:

3x的平方-5x-2分之5x+11=x-2分之m-3x+1分之n求mn
求m和n 不是mn

3x^2-5x/2+11=x-m/2-3x+n-m/2-3x=-5x/2m=-xn=3x^2+113x^2-(5x+11)/(5x-2)=m/(x-2)-n/(3x+1)(15x^3-6x^2-5x-11)/(5x-2)=(3mx+m-nx+2n)/[(x-2)(3x+1)](15x^3-6x^2-5x-11)(x-2)(3x+1)=(3mx+m-nx+2n)(5x-2)(15x^3-6x^2-5...