Question
Find roots of polynomial $$ p(x) = x^2+8x-\frac{112}{9} $$
Answer
The roots of polynomial $ p(x) $ are:
$$ \begin{aligned}x_1 &= \dfrac{ 4 }{ 3 }\\[1 em]x_2 &= -\dfrac{ 28 }{ 3 } \end{aligned} $$Explanation
Step 1:
Get rid of fractions by multipling equation by $ \color{blue}{ 9 } $.
$$ \begin{aligned} x^2+8x-\frac{112}{9} & = 0 ~~~ / \cdot \color{blue}{ 9 } \\[1 em] 9x^2+72x-112 & = 0 \end{aligned} $$Step 2:
The solutions of $ 9x^2+72x-112 = 0 $ are: $ x = -\dfrac{ 28 }{ 3 } ~ \text{and} ~ x = \dfrac{ 4 }{ 3 }$.
You can use step-by-step quadratic equation solver to see a detailed explanation on how to solve this quadratic equation.
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