已知多项式kx^2-6xy-8y^2可分解成(2mx+2y)(x-4y),求k,m的值
问题描述:
已知多项式kx^2-6xy-8y^2可分解成(2mx+2y)(x-4y),求k,m的值
答
(2mx+2y)(x-4y)=2mx^2+(2-8m)xy-8y^2
k=2m,2-8m=-6
k=2,m=1