Add or subtract.
(7x2-x-2)-(-6.x³ +3)
A) 6x²+7x²-x-5
B) -6x²+7x²-x+1
C) -x^3-x-5
D)x^2-x+1
B) -6x²+7x²-x+1
To add or subtract the given expression, we simplify each expression separately and then combine like terms.
Starting with (7x^2 - x - 2) - (-6x^3 + 3):
Step 1: Distribute the negative sign inside the parentheses.
(7x^2 - x - 2) + (6x^3 - 3)
Step 2: Combine like terms by adding the coefficients of the same degree terms.
7x^2 + x^3 - x - 5
So, the simplified expression is x^3 + 7x^2 - x - 5.
Therefore, the correct answer is A) 6x² + 7x² - x - 5.