把y=x²-4x+1写成y=a(x-h)²+k的形式为,
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把y=x²-4x+1写成y=a(x-h)²+k的形式为,
把y=x²-4x+1写成y=a(x-h)²+k的形式为,
把y=x²-4x+1写成y=a(x-h)²+k的形式为,
y=x²-4x+1
y=x²-4x+4-3
y=(x-2)²-3
y=x²-4x+1
=(x²-4x+4)+1-4
=(x-2)²-3
y=x²-4x+1=x²-4x+4-4+1=(x-2)²-3
y=x²-4x+1
y=x²-4x+4-3
y=(x-2)²-3
a=1 h=2 k=-3