preform the operation (-6x^2+3x) + (-x+6)

To perform the operation (-6x^2+3x) + (-x+6), we need to combine like terms. Like terms refer to terms that have the same variable and exponent.

(-6x^2 + 3x) + (-x + 6) can be simplified as follows:

Combine the x^2 terms: -6x^2 + 0

Combine the x terms: 3x - x = 2x

Combine the constant terms: 0 + 6 = 6

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