Question
Add the following expression:
$5 x-2 x^2-8,8 x^2-7 x-9,3+7 x^2-2 x$
$5 x-2 x^2-8,8 x^2-7 x-9,3+7 x^2-2 x$
✓
Answer
$\left(5 x-2 x^2-8\right)+\left(8 x^2-7 x-9\right)+\left(3+7 x^2+2 x\right)$
$=\left(-2 x^2+5 x-8\right)+\left(8 x^2-7 x-9\right)+\left(7 x^2-2 x+3\right)$
$=13 x^2-4 x-14$
$-2\text{x}^2+5\text{x}-8\\\ \ \ 8\text{x}^2-7\text{x}-9\\\ \ \ 7\text{x}^2-2\text{x}+3\\\underline{\overline{13\text{x}^2-4\text{x}-14}}$
$=\left(-2 x^2+5 x-8\right)+\left(8 x^2-7 x-9\right)+\left(7 x^2-2 x+3\right)$
$=13 x^2-4 x-14$
$-2\text{x}^2+5\text{x}-8\\\ \ \ 8\text{x}^2-7\text{x}-9\\\ \ \ 7\text{x}^2-2\text{x}+3\\\underline{\overline{13\text{x}^2-4\text{x}-14}}$
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