Multiply. (2n^2+5n+4)(2n-4)

Question

(explain it to me)

A. 4n^3-2n^2+28n-16
B. 4n^3+12n^2-2n-16
C. 4n^3+2n-12-16
D. 4n^3+18n^2-28n-16

please show me how you found it!

Answer 1

(2n^2+5n+4)(-4) = -8n^2 - 20n - 16

(2n^2+5n+4)(2n) = 4n^3 + 10n^2 + 8n

Combine like terms.

Looks like you have typos for C.

Answer 2

the answer is
4n^3+2n^2−12n−16

Answer 3

hi