X+Y=2 XY=3 求 2【XY+(-3x)】-3(2Y-XY)的值我做了一半了,2【XY+(-3x)】-3(2Y-XY)=2XY-6X-6Y=3xy=5xy-6x-6y
问题描述:
X+Y=2 XY=3 求 2【XY+(-3x)】-3(2Y-XY)的值
我做了一半了,2【XY+(-3x)】-3(2Y-XY)=2XY-6X-6Y=3xy=5xy-6x-6y
答
X+Y=2 XY=3 求 2【XY+(-3x)】-3(2Y-XY)的值
我做了一半了,2【XY+(-3x)】-3(2Y-XY)=2XY-6X-6Y=3xy=5xy-6x-6y