Question

若2X+1的绝对值与(Y+2)的和的平方是互为相反数,则XY=( )?

Answer 1

2X+1的绝对值与(Y+2)的和的平方是互为相反数

2X+1=0
Y+2=0

X=-1/2
Y=-2

X*Y=(-1/2)*(-2)=1

Answer 2

1
|2X+1|=(Y+2)^2
所以2+1=0 +2=0
X=-1/2 Y=-2
XY=1

Answer 3

二分之一

Answer 4

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