Find roots of polynomial $$ p(x) = 6x-2x-25x-12 $$

The root of polynomial $ p(x) $ is:

$$ \begin{aligned}x &= -\frac{ 4 }{ 7 } \end{aligned} $$

Step 1:

Combine like terms:

$$ \color{blue}{6x} \color{red}{-2x} \color{red}{-25x} -12 = \color{red}{-21x} -12 $$

Step 2:

$$ \begin{aligned} -21x-12 & = 0 \\[1 em] -21 \cdot x & = 12 \\[1 em] x & = \frac{ 12 }{ -21 } \\[1 em] x & = \frac{ 12 : 3 }{ -21 : 3} \\[1 em] x & = -\frac{ 4 }{ 7 } \end{aligned} $$

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