解方程:y^2+4=54(y-5)^2=16x^2+2x-4=0(y-2)^2=2(y-2)
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解方程:
y^2+4=5
4(y-5)^2=16
x^2+2x-4=0
(y-2)^2=2(y-2)
y^2+4=5
4(y-5)^2=16
x^2+2x-4=0
(y-2)^2=2(y-2)
Y^2=1
Y=1,-1
(y-5)^2=4
y-5=2或Y-5=-2
y=7或y=3
(x+1)^2=5
x=根号5 -1 或x=-根号5-1
Y=4或Y=2
Y=1,-1
(y-5)^2=4
y-5=2或Y-5=-2
y=7或y=3
(x+1)^2=5
x=根号5 -1 或x=-根号5-1
Y=4或Y=2
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