(-5x^2+2x+6)-(9x^2+2x+9)+(-6x^2+5x-3) simplified

Question

asked Sep 2, 2021 120k views

2 Answers

Edit · Answer 1 · 2021-09-08T01:00:19+0000

Answer:

$-20x^2+5x-6\\$

Explanation:

Start by removing the grouping symbols (parentheses) using the sign rules:

$(-5x^2+2x+6)-(9x^2+2x+9)+(-6x^2+5x-3)=\\=-5x^2+2x+6-9x^2-2x-9-6x^2+5x-3$

Then we re-order and combine like terms:

$-5x^2+2x+6-9x^2-2x-9-6x^2+5x-3=\\=-5x^2-9x^2-6x^2+2x-2x+5x+6-9-3=\\=-20x^2+5x-6$