小填空,come in!如图
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小填空,comein!如图小填空,comein!如图小填空,comein!如图∵x-y=m∴y=x-m带入x²-2y=-4得x²-2x+2m+4=0∵方程组有两个相同的实数解∴Δ=
小填空,come in!如图
小填空,come in!
如图
小填空,come in!如图
∵x-y=m
∴y=x-m
带入x²-2y=-4
得x²-2x+2m+4=0
∵方程组有两个相同的实数解
∴Δ=(-2)²-4×(2m+4)=0
m=-3/2
带入方程组
得x=1,y=5/2
小填空,COME IN!如图
小填空,come in!如图
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