Question

Tìm x biết:

x^2(x-3)+3x=1

Answer 1

<=> x^3 - 3x^2 + 3x - 1 = 0

<=> (x-1)^3 = 0

<=> x - 1 = 0

<=> x = 1

Answer 2

    x²(x-3)+3x=1\(\Leftrightarrow\) x³-3x²+3x-1=0\(\Leftrightarrow\)(x-1)³=0\(\Leftrightarrow\)x-1=0\(\Leftrightarrow\)x=1