因式分解(x+2y)^2-1/4(x+24)+1/4

问题描述:

因式分解(x+2y)^2-1/4(x+24)+1/4
之后一定追加

(x+2y)^2-1/4(x+24)+1/4
=x^2+4y^2+4xy-(1/4)x+23/4