Question

Write the product as a trinomial.


(2x + 3)(4x – 2)


A.
8x2+ 8x – 6

B.
6x2 + 13x – 6

C.
6x2 – 5x – 6

D.
6x2 – 13x – 6

Answer 1

(2x + 3)(4x – 2)

Let's split it up:

2x • 4x

2x • 2

3 • 4x

3 • (-2)

Answer 2

2x • 4x = 6x

2x • (-2) = -2x2

3 • 4x = 12x

3 • (-2) = -6

Answer 3

I think I did something wrong actually. o-o

Answer 4

O yep, 2x • 4x = 6x2

Answer 5

2x • (-2) is just -4x

Answer 6

Now combine like terms.

6x2 - 4x + 12x - 6

6x2 + 8x - 6

Answer 7

Hmm, are you sure the first option is right?

Answer 8

Ok, it's 8x2 + 8x - 6

Answer 9

2x • 4x is 8x2 :P

Answer 10

So A

Answer 11

thank you!

Answer 12

http://www.wolframalpha.com/input/?i=expand++%282x+%2B+3%29%284x+%E2%80%93+2%29