Question

BRAINLIEST for the correct answer!

Answer 1

Answer:

answer is A

Step-by-step explanation:

(3$x^{2}$+5x+1) ($x^{2}$−2x+4)

=(3$x^{2}$+5x+1)($x^{2}$+−2x+4)

=(3$x^{2}$)($x^{2}$)+(3$x^{2}$)(−2x)+(3$x^{2}$)(4)+(5x)($x^{2}$)+(5x)(−2x)+(5x)(4)+(1)($x^{2}$)+(1)(−2x)+(1)(4)

=3$x^{4}$−6$x^{3}$+12$x^{2}$+5$x^{3}$−10$x^{2}$+20x+$x^{2}$−2x+4

=3$x^{4}$ − $x^{3}$ + 3$x^{2}$ + 18x +4