x²-6x+9=(1-2x)²用分解因式发解
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x²-6x+9=(1-2x)²用分解因式发解
x²-6x+9=(1-2x)²用分解因式发解
x²-6x+9=(1-2x)²用分解因式发解
x²-6x+9=(1-2x)²
(x-3)² - (1-2x)² = 0
(-x-2)(3x-4)=0
x₁ = - 2,x₂ = 4/3
-2,4/3
(x-3)2=(1-2x)2 (x-3)2-(1-2x)2 =0
(x+2)(3x-4)=0 解得: x1=-2 x2=4/3