# Appendix A - Practice: 8

Appendix A - Practice : 8 (Answer) $(7b^{3} - b^{2}) - (3b^{3} - 4b^{2} + 6)$ $= 4b^{3} + 3b^{2} - 6$

#### Work Step by Step

Appendix A - Practice : 8 (Solution) $(7b^{3} - b^{2}) - (3b^{3} - 4b^{2} + 6)$ $= 7b^{3} - 3b^{3} - b^{2} + 4b^{2} - 6$ (Change signs and group like terms) $= 4b^{3} + 3b^{2} - 6$ (Combine like terms)

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