Question

Simplify.

(x2 + 5x + 1)(x2 + x + 3)

A.
x4 + 6x3 + 9x2 + 16x + 3

B.
x4 + 8x2 + 15

C.
x4 + 2x3 + 6x2 + 7x + 14

D.
2x2 + 8x + 15

Answer 1

(x^2*x^2)+(x^2*x)+(x^2*3)+(5x*x^2)+(5x*x)+(5x*3)+(1*x^2)+(1*x)+(1*3)

simplify

Answer 2

the answer is a. take the first equation in parathenses and distribute it to each element of the second equation: x^2(x^2+x+3)+5x(x^2+x+3)+(x^2+x+3). simpilify and combine like terms to get the answer A.