已知(x-3)²+|y+5|=0,则xy-y^x=__________

已知(x-3)²+|y+5|=0,则xy-y^x=__________
已知(x-3)²+|y+5|=0,则xy-y^x=__________

已知(x-3)²+|y+5|=0,则xy-y^x=__________
x=3,y=-5 故,原=3*（-5）-（-5）^3=-15+125=110

(x-3)²+|y+5|=0
可知x-3=0,y+5=0
x=3,y=5
xy-y^x=3*5-5^3=-110

因为(x-3)²+|y+5|=0，(x-3)²>=0,|y+5|>=0,所以x-3=0，x=3;y+5=0,y=-5,
xy-y^x=3*(-5)-(-5)^3=15+125=110