解下列方程 x2-4x-45=0 X(x+4)=-3(x+4) (4y-1)平方-5=0 (x+3)平方=2x+5 ( 2x+1)(x-3)=-6求解决····
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![解下列方程 x2-4x-45=0 X(x+4)=-3(x+4) (4y-1)平方-5=0 (x+3)平方=2x+5 ( 2x+1)(x-3)=-6求解决····](/uploads/image/z/11504608-16-8.jpg?t=%E8%A7%A3%E4%B8%8B%E5%88%97%E6%96%B9%E7%A8%8B+x2-4x-45%3D0+X%EF%BC%88x%2B4%29%3D-3%28x%2B4%29+%284y-1%29%E5%B9%B3%E6%96%B9-5%3D0+%EF%BC%88x%2B3%29%E5%B9%B3%E6%96%B9%3D2x%2B5+%EF%BC%88+2x%2B1%EF%BC%89%EF%BC%88x-3%29%3D-6%E6%B1%82%E8%A7%A3%E5%86%B3%C2%B7%C2%B7%C2%B7%C2%B7)
解下列方程 x2-4x-45=0 X(x+4)=-3(x+4) (4y-1)平方-5=0 (x+3)平方=2x+5 ( 2x+1)(x-3)=-6求解决····
解下列方程 x2-4x-45=0 X(x+4)=-3(x+4) (4y-1)平方-5=0 (x+3)平方=2x+5 ( 2x+1)(x-3)=-6
求解决····
解下列方程 x2-4x-45=0 X(x+4)=-3(x+4) (4y-1)平方-5=0 (x+3)平方=2x+5 ( 2x+1)(x-3)=-6求解决····
x^2-4x-45=0
(x+5)(x-9)=0
x1=-5,x2=9
x(x+4)=-3(x+4)
x(x+4)+3(x+4) =0
(x+3)(x+4)=0
x1=-3,x2=-4
(4y-1)平方-5=0
(4y-1)平方=5
4y-1=±√5
y1=(1-√5)/4,y2=(1+√5)/4
(x+3)平方=2x+5
(x+3)平方-2x-5=0
(x+3)平方-2(x+3)+1=0
(x+3-1)平方=0
(x+2)平方=0
x=-2
(2x+1)(x-3)=-6
(2x+1)(x-3)+6=0
2x^2-5x-3+6=0
2x^2-5x+3=0
(x-1)(2x-3)=0
x1=1,x2=3/2
x²-4x-45=0
(x+5)(x-9)=0
x1=-5或x2=9
x(x+4)=-3(x+4)
x²+4x+3x+12=0
x²+7x+12=0
(x+3)(x+4)=0
x1=-3或x2=-4
(4y-1)²-5=0
(4y-1)²=5
4y-1=±√5
...
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x²-4x-45=0
(x+5)(x-9)=0
x1=-5或x2=9
x(x+4)=-3(x+4)
x²+4x+3x+12=0
x²+7x+12=0
(x+3)(x+4)=0
x1=-3或x2=-4
(4y-1)²-5=0
(4y-1)²=5
4y-1=±√5
y1=(1-√5)/4或y2=(1+√5)/4
(x+3)²=2x+5
x²+6x+9-2x-5=0
x²+4x+4=0
(x+2)²=0
x=-2
(2x+1)(x-3)=-6
2x²-6x+x-3+6=0
2x²-5x+3=0
(x-1)(2x-3)=0
x1=1或x2=3/2
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