解方程(1)2x的2次方-3x=2(2)x的2次方-2x-5=0(3)(x+2)(x-1)=1(4),4x(2x+1)=3(2x+1)
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解方程(1)2x的2次方-3x=2(2)x的2次方-2x-5=0(3)(x+2)(x-1)=1(4),4x(2x+1)=3(2x+1)
解方程(1)2x的2次方-3x=2(2)x的2次方-2x-5=0(3)(x+2)(x-1)=1
(4),4x(2x+1)=3(2x+1)
解方程(1)2x的2次方-3x=2(2)x的2次方-2x-5=0(3)(x+2)(x-1)=1(4),4x(2x+1)=3(2x+1)
2x²-3x=2
2x²-3x-2=0
(2x+1)(x-2)=0
x1=-1/2,x2=2
x²-2x-5=0
x={-(-2)±√[(-2)²-4×1×(-5)]}/(2×1)
x=(2±√22)/2
x1=(2+√22)/2,x2=(2-√22)/2
(x+2)(x-1)=1
x²-x-2=1
x²-x-3=0
x={-(-1)±√[(-1)²-4×1×(-3)]}/(2×1)
x=(1±√13)/2
x1=(1+√13)/2,x2=(1-√13)/2
4x(2x+1)=3(2x+1)
4x(2x+1)-3(2x+1)=0
(4x-3)(2x+1)=0
x1=3/4,x2=-1/2
2x²-3x=2
2x²-3x-2=0
(2x+1)(x-2)=0
x1=-1/2,x2=2
x²-2x-5=0
x={-(-2)±√[(-2)²-4×1×(-5)]}/(2×1)
x=(2±2√6)/2
x1=1+√6,x2=1-√6
(x+2)(x-1)=1
x²...
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2x²-3x=2
2x²-3x-2=0
(2x+1)(x-2)=0
x1=-1/2,x2=2
x²-2x-5=0
x={-(-2)±√[(-2)²-4×1×(-5)]}/(2×1)
x=(2±2√6)/2
x1=1+√6,x2=1-√6
(x+2)(x-1)=1
x²+x-2=1
x²+x-3=0
x={-1±√[1²-4×1×(-3)]}/(2×1)
x=(-1±√13)/2
x1=(-1+√13)/2,x2=-(1+√13)/2
4x(2x+1)=3(2x+1)
4x(2x+1)-3(2x+1)=0
(4x-3)(2x+1)=0
x1=3/4,x2=-1/2
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(1)-3X=2→X=-2/3→(2*(-2/3))²=16/9
(2)-2X-5=0→X=-2.5→(-2.5)²=6.25
(3)(X+2)(X-1)=1→X²-X+2X-2=1→X²+X-3=0→X²+X+(1/2)²-(1/2)²-3=0→(X+0.5)²=3.25→X+0.5=±1.8→X1=...
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(1)-3X=2→X=-2/3→(2*(-2/3))²=16/9
(2)-2X-5=0→X=-2.5→(-2.5)²=6.25
(3)(X+2)(X-1)=1→X²-X+2X-2=1→X²+X-3=0→X²+X+(1/2)²-(1/2)²-3=0→(X+0.5)²=3.25→X+0.5=±1.8→X1=2.3,X2=1.3
(4)4x(2x+1)=3(2x+1)→8X²+4X=6X+3→8X²-2X-3=0→(2X+1)(4X-3)=0→X1=-1/2,X2=3/4
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