Perform the operation. (−5x 2 +6x+6)−(6x 2 −5)

To perform the operation, we need to distribute the negative sign to each term in the second parentheses and combine like terms.

(-5x^2 + 6x + 6) - (6x^2 - 5)

First, distribute the negative sign to each term in the second parentheses:

-5x^2 + 6x + 6 - 6x^2 + 5

Next, combine like terms. Since -5x^2 and -6x^2 have the same variable and exponent, we can combine them:

(-5x^2 - 6x^2) + 6x + 6 + 5

Add the coefficients of -5x^2 and -6x^2:

-11x^2 + 6x + 6 + 5

Combine the constants 6 and 5:

-11x^2 + 6x + 11

Therefore, the simplified expression is -11x^2 + 6x + 11.