(1)若|x-3|+(y+2)²=0,则x的y次方=?(2)若|x|=1,y²=9,且xy>0,则x+2y=?(3)若2x-y=3+y,则2x-2y+1/x-y=?答得好者绝对给好评!

问题描述:

(1)若|x-3|+(y+2)²=0,则x的y次方=?(2)若|x|=1,y²=9,且xy>0,则x+2y=?(3)
若2x-y=3+y,则2x-2y+1/x-y=?
答得好者绝对给好评!