perform the indicated operation by removing the parentheses and combining like terms (-2x^2+8)+(-7x^2-9x)

To perform the indicated operation and combine like terms, you need to add the coefficients of the same-degree terms together. Here's the step-by-step process: Given expression: (-2x^2 + 8) + (-7x^2 - 9x) 1. Combine the like terms in the parentheses: -2x^2 + (-7x^2) = -2x^2 - 7x^2 = -9x^2 8 + 0 = 8 (since there is no x term in the second parentheses) -9x + (-9x) = -9x - 9x = -18x 2. Now add the results of the above steps together: -9x^2 + 8 - 18x So, the simplified expression is: -9x^2 - 18x + 8