用因式分解法解下列方程
(x-4)²=(5-2x)²3x(2x+1)=4x+2x²-2x-2=0(x-3)(x+2)=6(x-1)²-2(x²-...
(x-4)²=(5-2x)² 3x(2x+1)=4x+2 x²-2x-2=0 (x-3)(x+2)=6 (x-1)²-2(x²-1)=0
(5x-1)²-2=0 展开
(5x-1)²-2=0 展开
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(x-4)^2=(5-2x)^2=>(x-4+5-2x)(x-4-5+2x)=0=>(1-x)(3x-9)=0=>x=1,x=3 3x(2x+1)=4x+2=>(2x+1)(3x-2)=0=>x=-1/2,x=2/3 x^2-2x-2=0=>(x-1)^2-3=0=>(x-1-3^1/2)(x-1+3^1/2)=0=>x=1+3^1/2,x=1-3^1/2 (x-3)(x+2)=6=>x^2-x-12=0=>(x+3)(x-4)=0=>x=-3,x=4 (x-1)^2-2(x^2-1)=0=>(x-1)(x-1-2x-2)=0=>x=1,x=-3 (5x-1)^2-2=0=>(5x-1+2^1/2)(5x-1-2^1/2)=0=>x=(1-2^1/2)/5,x=(1+2^1/2)/5
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