Answer
Appendix A - Ex. Set : 29 (Answer)
$(3x^2 - 4x + 8) - (5x^2 - 7)$
$= - 2x^2 - 4x + 15$
Work Step by Step
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)