Perform the operation (-8x^2 + 3) + ( x^2 + 3x - 8)

To perform the given operation: (-8x^2 + 3) + (x^2 + 3x - 8), we need to combine like terms.

(-8x^2 + 3) + (x^2 + 3x - 8)

= -8x^2 + x^2 + 3x + 3 - 8

= (-8x^2 + x^2) + (3x) + (3 - 8)

= -7x^2 + 3x - 5