设全集U={2,3,x²+2x-3},A={5},CuA=(2,y),求x,y的值求过程详细

设全集U={2,3,x²+2x-3},A={5},CuA=(2,y),求x,y的值求过程详细
设全集U={2,3,x²+2x-3},A={5},CuA=(2,y),求x,y的值求过程详细

设全集U={2,3,x²+2x-3},A={5},CuA=(2,y),求x,y的值求过程详细
U={2,3,x²+2x-3},A={5},CuA=(2,y)
那么x²+2x-3=5
故x²+2x-8=0
那么x=-4或x=2
y=3
即x=-4或x=2,y=3
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