因式分解:(1)ma²-18ma-40m (2)x³-5x²y-24xy²急用

问题描述:

因式分解:(1)ma²-18ma-40m (2)x³-5x²y-24xy²
急用

(1)原式=m(a²-18a-40)=m(a-20)(a+2)
(2)原式=x(x²-5xy-24y²)=x(x-8y)(x+3y)

(1)ma²-18ma-40m=m(a-20)(a+2)
(2)x³-5x²y-24xy²=x(x²-5xy-24y²)=x(x-8y)(x+3y)