解下列方程2x²+1=3x (x-3)²+4x(x-30=0
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解下列方程2x²+1=3x (x-3)²+4x(x-30=0
解下列方程2x²+1=3x (x-3)²+4x(x-30=0
解下列方程2x²+1=3x (x-3)²+4x(x-30=0
2x²+1=3x
2x²-3x+1=0
(2x-1)(x-1)=0
x1=1/2 x2=1
(x-3)²+4x(x-3)=0
(x-3)(x-3+4x)=0
(x-3)(5x-3)=0
x1=3 x2=3/5
x=1或x=1/2