式子化简x2-2x≥-2y+y2,变(x−y)(x+y−2)≥0 怎么化
问题描述:
式子化简x2-2x≥-2y+y2,变(x−y)(x+y−2)≥0 怎么化
化简x^2-2x≥-2y+y^2
答
移项
x²-y²-2x+2y≥0
(x+y)(x-y)-2(x-y)≥0
(x-y)(x+y-2)≥0