Question

Multiply (5x2 + x − 4)(x + 2).

5x3 + x2 − 4x − 8
5x3 + 11x2 − 2x − 8
5x3 + 10x2 − 4x − 8
5x3 + 20x2 + 2x − 8

Answer 1

Simply expand the terms,

Multiply (5x2 + x − 4)(x + 2).

\(\sf \Rightarrow x(5x^2+x-4)+2(5x^2+x-4)\)

Answer 2

I got B, any reason why/whynot it wouldn't be?

Answer 3

That's the correct answer c:

Answer 4

Okay I thought so, Thanks :)