解一元二次方程:(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0(3) x2+5x+k2=2kx+5k+6(4)x2-4ax+3a2=1-2a
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![解一元二次方程:(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0(3) x2+5x+k2=2kx+5k+6(4)x2-4ax+3a2=1-2a](/uploads/image/z/12635827-43-7.jpg?t=%E8%A7%A3%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%89%EF%BC%882x-3%EF%BC%892%3D%28a-2%29%283a-4%29+%EF%BC%882%EF%BC%89%EF%BC%88x2-2x-2%292-7%28x2-2x-2%29%2B6%3D0%EF%BC%881%EF%BC%89%EF%BC%882x-3%EF%BC%892%3D%28a-2%29%283a-4%29+%EF%BC%882%EF%BC%89%EF%BC%88x2-2x-2%292-7%28x2-2x-2%29%2B6%3D0%283%29+x2%2B5x%2Bk2%3D2kx%2B5k%2B6%284%29x2-4ax%2B3a2%3D1-2a)
解一元二次方程:(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0(3) x2+5x+k2=2kx+5k+6(4)x2-4ax+3a2=1-2a
解一元二次方程:(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0
(1)(2x-3)2=(a-2)(3a-4)
(2)(x2-2x-2)2-7(x2-2x-2)+6=0
(3) x2+5x+k2=2kx+5k+6
(4)x2-4ax+3a2=1-2a
解一元二次方程:(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0(1)(2x-3)2=(a-2)(3a-4) (2)(x2-2x-2)2-7(x2-2x-2)+6=0(3) x2+5x+k2=2kx+5k+6(4)x2-4ax+3a2=1-2a
(1)(2x-3)2=(a-2)(3a-4)
4x-6=3a^2-10a+8
4x=3a^2-10a+14
x=(3a^2-10a+14)/4
(2)(x2-2x-2)2-7(x2-2x-2)+6=0
[(x^2-2x-2)-6][(x^2-2x-2)-1]=0
(x^2-2x-8)(x^2-2x-3)=0
(x-4)(x+2)(x-3)(x+1)=0
x=4,x=-2,x=3,x=-1
(3) x2+5x+k2=2kx+5k+6
x^2+x(5-2k)+k^2-5k-6=0
x^2+x(5-2k)+(k-6)(k+1)=0
[x-(k-6)][x-(k+1)]=0
x=k-6,x=k+1
(4)x2-4ax+3a2=1-2a
x^2-4ax+3a^2+2a-1=0
x^2-4ax+(3a-1)(a+1)=0
[x-(3a-1)][x-(a+1)]=0
x=3a-1,x=a+1
4a-6=3a方-10a 8
-3a方 14a-14=0
口算的。。没笔,剩下都这样展开了移到一边用平方公式算就可以了。