化简:X^2+Y^2-Z^2+2XY/X^2-Y^2+Z^2-2XZ=___
问题描述:
化简:X^2+Y^2-Z^2+2XY/X^2-Y^2+Z^2-2XZ=___
尽快哦
答
X^2+Y^2-Z^2+2XY/X^2-Y^2+Z^2-2XZ
=(X+Y)^2-Z^2 / (X-Z)^2-Y^2
=X+Y-Z /X-Y-Z