由题意：
x=11或者-11
y-2=0即：y=2
当x=11时,
xy=11×（-2）=-22
当x=-11时,
xy=（-11）×（-2）=22
已知x的平方等于121,根号y减二等于零,求xy的值
已知x的平方等于121,根号y减二等于零,求xy的值
数学人气：713 ℃时间：2019-08-20 13:18:47
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