4(x-2)y^2+9(2-x)的因式分解怎么解?
问题描述:
4(x-2)y^2+9(2-x)的因式分解怎么解?
答
4(x-2)y^2+9(2-x)
=4(x-2)y^2-9(x-2)
=(x-2)(4y^2-9)
=(x-2)(2y+3)(2y-3)