Add or subtract.
(7x²-x-2)-(-6x³+3)
To subtract -(-6x³+3), we need to distribute the negative sign and change the signs of all the terms inside the parentheses:
(7x²-x-2) + (6x³-3)
Now, we can combine like terms, starting with the highest degree:
6x³ + 7x² - x - 2 - 3
= 6x³ + 7x² - x - 5
Thus, (7x²-x-2)-(-6x³+3) = 6x³ + 7x² - x - 5.