用因式分解法解下列方程:X²-3X-4=0 (2X-1)(X-1)=3

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用因式分解法解下列方程:X²-3X-4=0 (2X-1)(X-1)=3

用因式分解法解下列方程:X²-3X-4=0 (2X-1)(X-1)=3
用因式分解法解下列方程:X²-3X-4=0 (2X-1)(X-1)=3

用因式分解法解下列方程:X²-3X-4=0 (2X-1)(X-1)=3
X²-3X-4=0
(x-4)(x+1)=0
x-4=0 x=4
x+1=0 x=-1
(2X-1)(X-1)=3
2x^2-3x+1=3
2x^2-3x-2=0
(2x+1)(x-2)=0
2x+1=0 x=-1/2
x-2=0 x=2

X²-3X-4=0
(x-4)(x+1)=0
x-4=0 x=4
x+1=0 x=-1
(2X-1)(X-1)=3
2x^2-3x+1=3
2x^2-3x-2=0
(2x+1)(x-2)=0
2x+1=0 x=-1/2
x-2=0 x=2

X²-3X-4=0
(x-4)(x+1)=0
x-4=0 x=4
x+1=0 x=-1