Ответ:f(x)=3x²-12x+9
x²-4x+3
D=4²-4×3=4=2²
X1=4+2/2=3
X2=4-2/2=1
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Ответ:f(x)=3x²-12x+9
x²-4x+3
D=4²-4×3=4=2²
X1=4+2/2=3
X2=4-2/2=1