## Algebra: A Combined Approach (4th Edition)

Appendix A - Ex. Set : 29 (Answer) $(3x^2 - 4x + 8) - (5x^2 - 7)$ $= - 2x^2 - 4x + 15$
Appendix A - Ex. Set : 29 (Solution) $(3x^2 - 4x + 8) - (5x^2 - 7)$ $= 3x^2 - 5x^2 - 4x + 8 + 7$ (Change signs and group like terms) $= - 2x^2 - 4x + 15$ (Combine like terms)