计算:[(x-y)^2+3(x^2-(1/3)y^2)]/2x
问题描述:
计算:[(x-y)^2+3(x^2-(1/3)y^2)]/2x
答
解
原式
=[(x²-2xy+y²)+3x²-y²]/2x
=(4x²-2xy)/2x
=2x-y