$$5x^2+30x+42 = 0$$
Answer
$$ \begin{matrix}x_1 = -3-\dfrac{\sqrt{ 15 }}{ 5 } & x_2 = -3+\dfrac{\sqrt{ 15 }}{ 5 } \\[1 em] \end{matrix} $$
Explanation
$ 5x^{2}+30x+42 = 0 $ is a quadratic equation.
You can use step-by-step quadratic equation solver to see a detailed explanation on how to solve this equation.
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