Answer
Appendix A - Practice : 9 (Answer)
$(5x - 1)(2x^{2} - x + 4)$
$= 10x^{3} - 7x^{2} + 21x - 4$
Work Step by Step
Appendix A - Practice : 9 (Solution)
$(5x - 1)(2x^{2} - x + 4)$
$= 5x(2x^{2} - x + 4) - (1)(2x^{2} - x + 4)$
$= 10x^{3} - 5x^{2} + 20x - 2x^{2} + x - 4$
$= 10x^{3} - 7x^{2} + 21x - 4$ (Combine like terms)