Answer:
8x² -11x -10
Explanation:
You want the sum of (6x² -2x) and (2x² -9x -10).
Sum
The sum is indicated by putting a + sign between the expressions you want to add:
(6x² -2x) + (2x² -9x -10)
This is simplified by combining like terms. It may be helpful to arrange like terms adjacent to each other:
= 6x² +2x² -2x -9x -10
= (6+2)x² +(-2 -9)x -10
= 8x² -11x -10
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