1.x^2+11xy+24y^2

问题描述:

1.x^2+11xy+24y^2
2.x-1-1/4x^2
(计算题,

x^2+11xy+24y^2 =(x+3y)(x+8y)
若题目是x^2-1-1/4x^2
.x-1-1/4x^2=-(1/2x-x)^2