Question

Find the product when you multiply the polynomials (−4x4+10x)(5x3−1).

a −20x7−54x4−10x

b 20x7+54x4−10x

c −20x7+54x4−10x

d −20x7+50x4−6x

Answer 1

C, -20x^7+54x^4-10x

Explanation:

FOIL

-4x^4*5x^3=-20x^7

-4x^4*-1=4x^4

10x^5x^3=50x^4

10x*-1=-10x

-20x^7 +50x^4+4x^4-10x

Combine like terms

-20x^7+54x^4-10x