x^2-9x+14因式分解
问题描述:
x^2-9x+14因式分解
答
(x-2)(x-7)
答
x^2-9x+14
=(x-7)(x-2)
答
=x^2-7x-2x+14
=x(x-7)-2(x-7)
=(x-7)(x-2)
答
(x-2)(x-7)