解下列方程:(1)x²-2x+1=25(2)x(2x-5)=4x-10(3)x²+5x+7=3x+11(4)1-8x+16x²=2-8x
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![解下列方程:(1)x²-2x+1=25(2)x(2x-5)=4x-10(3)x²+5x+7=3x+11(4)1-8x+16x²=2-8x](/uploads/image/z/142789-13-9.jpg?t=%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B%EF%BC%9A%EF%BC%881%EF%BC%89x%26%23178%3B-2x%2B1%3D25%EF%BC%882%EF%BC%89x%282x-5%29%3D4x-10%EF%BC%883%EF%BC%89x%26%23178%3B%2B5x%2B7%3D3x%2B11%EF%BC%884%EF%BC%891-8x%2B16x%26%23178%3B%3D2-8x)
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解下列方程:(1)x²-2x+1=25(2)x(2x-5)=4x-10(3)x²+5x+7=3x+11(4)1-8x+16x²=2-8x
解下列方程:(1)x²-2x+1=25(2)x(2x-5)=4x-10(3)x²+5x+7=3x+11(4)1-8x+16x²=2-8x
解下列方程:(1)x²-2x+1=25(2)x(2x-5)=4x-10(3)x²+5x+7=3x+11(4)1-8x+16x²=2-8x
(1)x²-2x+1=25
x²-2x-24=0
(x-6)(x+4)=0
x=6或x=-4
(2)x(2x-5)=4x-10
2x²-5x=4x-10
2x²-9x+10=0
(2x-5)(x-2)=0
x=5/2或x=2
(3)x²+5x+7=3x+11
x...
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(1)x²-2x+1=25
x²-2x-24=0
(x-6)(x+4)=0
x=6或x=-4
(2)x(2x-5)=4x-10
2x²-5x=4x-10
2x²-9x+10=0
(2x-5)(x-2)=0
x=5/2或x=2
(3)x²+5x+7=3x+11
x²-2x=4
x²-2x+1=4+1
(x-1)²=5
x-1=±√5
x=1+√5或x=1-√5
(4)1-8x+16x²=2-8x
16x²=1
x²=1/16
x=±1/4
即:x=1/4或x=-1/4
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