x²-xy+四分之一y² 分解因式
问题描述:
x²-xy+四分之一y² 分解因式
答
(x+y)*(x+y-1)+1/4=x^2+xy-x+xy+y^2-y+1/4=x^2+2xy+y^2-x-y+1/4=(x+y)^2-(x+y)+(1/2)^2=(x+y-1/2)^2%D%A........
x²-xy+四分之一y² 分解因式
(x+y)*(x+y-1)+1/4=x^2+xy-x+xy+y^2-y+1/4=x^2+2xy+y^2-x-y+1/4=(x+y)^2-(x+y)+(1/2)^2=(x+y-1/2)^2%D%A........