Answer
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)