Question

（1）若4|2a+2|+(2b-3)²=0,则a+b=?（2）若x²=9,2|y+2|=4,且xy＜

Answer 1

（1）2a+2=0

a=-1

2b-3=0

b=3/2

a+b=1/2

(2) x^2=9 x=3或x=-3

y+2=2或y+2=-2

y=0或y=-4

xy