Answer:
=-2x^3 + 14x^2 - 12x - 16
Step-by-step explanation:
=(x^2 + -5x + -4)(-2x + 4)
=(x^2)(-2x) + (x^2)(4) + (-5x)(-2x) + (-5x)(4) + (-4)(-2x) + (-4)(4)
=-2x^3 + 14x^2 + 10x^2 - 20x + 8x - 16
=2x^3 + 14x^2 - 12x - 16
