Answer:
<h2>
−3x² − 8x − 1</h2>
Step-by-step explanation:
(2x² − 6x + 7) − (5x² + 2x +8)
<em>To find the opposite of 5x² + 2x + 8, find the opposite of each term.
</em>
2x² − 6x + 7 − 5x² − 2x − 8
<em>Combine 2x² and −5x² to get −3x²</em>
−3x² − 6x + 7 − 2x − 8
<em>Combine −6x and −2x to get −8x.
</em>
−3x² − 8x + 7 − 8
<em>Subtract 8 from 7 to get −1.
</em>
−3x² − 8x − 1