$$x^2-3+7+3x^2+5x-9 = 0$$
Answer
$$ \begin{matrix}x_1 = -\dfrac{ 5 }{ 8 }-\dfrac{\sqrt{ 105 }}{ 8 } & x_2 = -\dfrac{ 5 }{ 8 }+\dfrac{\sqrt{ 105 }}{ 8 } \\[1 em] \end{matrix} $$
Explanation
$$ \begin{aligned} x^2-3+7+3x^2+5x-9 &= 0&& \text{simplify left side} \\[1 em]4x^2+5x-5 &= 0&& \\[1 em] \end{aligned} $$
$ 4x^{2}+5x-5 = 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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