(1)若4|2a+2|+(2b-3)²=0,则a+b=?(2)若x²=9,2|y+2|=4,且xy<
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(1)若4|2a+2|+(2b-3)²=0,则a+b=?(2)若x²=9,2|y+2|=4,且xy<0,则x+y=?
![(1)若4|2a+2|+(2b-3)²=0,则a+b=?(2)若x²=9,2|y+2|=4,且xy<](/uploads/image/z/17494484-68-4.jpg?t=%EF%BC%881%EF%BC%89%E8%8B%A54%7C2a%2B2%7C%2B%282b-3%29%26%23178%3B%3D0%2C%E5%88%99a%2Bb%3D%3F%EF%BC%882%EF%BC%89%E8%8B%A5x%26%23178%3B%3D9%2C2%7Cy%2B2%7C%3D4%2C%E4%B8%94xy%EF%BC%9C)
(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
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
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