解下列一元二次方程:(1)9(x-2)²-121=0 (2)2(x-3)²=x(x-3)(1)9(x-2)²-121=0(2)2(x-3)²=x(x-3)(3)x²-2倍的根号5x+1=0(4)(x-1)²-5(x-1)+6=0
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![解下列一元二次方程:(1)9(x-2)²-121=0 (2)2(x-3)²=x(x-3)(1)9(x-2)²-121=0(2)2(x-3)²=x(x-3)(3)x²-2倍的根号5x+1=0(4)(x-1)²-5(x-1)+6=0](/uploads/image/z/2729589-69-9.jpg?t=%E8%A7%A3%E4%B8%8B%E5%88%97%E4%B8%80%E5%85%83%E4%BA%8C%E6%AC%A1%E6%96%B9%E7%A8%8B%EF%BC%9A%EF%BC%881%EF%BC%899%EF%BC%88x-2%29%26%23178%3B-121%3D0+%EF%BC%882%EF%BC%892%EF%BC%88x-3%EF%BC%89%26%23178%3B%3Dx%EF%BC%88x-3%EF%BC%89%EF%BC%881%EF%BC%899%EF%BC%88x-2%29%26%23178%3B-121%3D0%EF%BC%882%EF%BC%892%EF%BC%88x-3%EF%BC%89%26%23178%3B%3Dx%EF%BC%88x-3%EF%BC%89%EF%BC%883%EF%BC%89x%26%23178%3B-2%E5%80%8D%E7%9A%84%E6%A0%B9%E5%8F%B75x%2B1%3D0%EF%BC%884%EF%BC%89%EF%BC%88x-1%EF%BC%89%26%23178%3B-5%EF%BC%88x-1%EF%BC%89%2B6%3D0)
解下列一元二次方程:(1)9(x-2)²-121=0 (2)2(x-3)²=x(x-3)(1)9(x-2)²-121=0(2)2(x-3)²=x(x-3)(3)x²-2倍的根号5x+1=0(4)(x-1)²-5(x-1)+6=0
解下列一元二次方程:(1)9(x-2)²-121=0 (2)2(x-3)²=x(x-3)
(1)9(x-2)²-121=0
(2)2(x-3)²=x(x-3)
(3)x²-2倍的根号5x+1=0
(4)(x-1)²-5(x-1)+6=0
解下列一元二次方程:(1)9(x-2)²-121=0 (2)2(x-3)²=x(x-3)(1)9(x-2)²-121=0(2)2(x-3)²=x(x-3)(3)x²-2倍的根号5x+1=0(4)(x-1)²-5(x-1)+6=0
(1)9(x-2)²=121
(x-2)²=121/9
x-2=±11/3
x=11/3+2或x=2-11/3
x=17/3或x=-5/3
(2)2x²-12x+18=x²-3x
x²-9x+18=0
(x-3)(x-6)=0
x=3或x=6
(3)(x²-2)²(5x+1)=0
x²-2=0或5x+1=0
x等于正负根号2或x=-0.2
(4)[(x-1)-2][(x-1)-3]=0
(x-3)(x-4)=0
x=3或x=4
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(1) x=17/3 (2) x=3或6 (3)x=根号2或者-1/5 (4) x=3或4
(1) x=17/3或 -5/3
(2) x=3 ,x=6
(3) 题意不清
(4)x=3,x=4
(1)9(x-2)²=121
(x-2)²=121/9
x-2=±11/3
x1=17/3或x2=-5/3
(2)2x²-12x+18=x²-3x
x²-9x+18=0
(x-3)(x-6)=0
x1=3或x2=6
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(1)9(x-2)²=121
(x-2)²=121/9
x-2=±11/3
x1=17/3或x2=-5/3
(2)2x²-12x+18=x²-3x
x²-9x+18=0
(x-3)(x-6)=0
x1=3或x2=6
(3)(x²-2)²(5x+1)=0
x²-2=0或5x+1=0
x1=√2或x2=-0.2
(4)[(x-1)-2][(x-1)-3]=0
(x-3)(x-4)=0
x1=3或x2=4
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