Question

Calculate the product of the binomials (3x-2)(3x+1). Write your answer in descending order.

Answer 1

Should I be using FOIL?

Answer 2

Of course! :)

Answer 3

Now, how do I do that? lol I know it's first and then outer and then inner and then last... but numbers confuse me lol

Answer 4

Just multiply them. :))

Answer 5

So it would be (3x)(3x) as step one?

Answer 6

Yes. Producing 9x^2

Answer 7

Then step two is (3x)(1)?

Answer 8

Yes.

Answer 9

Which gives me 3x obviously. & then it's (2)(3x) which equals 6x?

Answer 10

Ooops! It should be (-2)(3x) and the last one should be (-2)(1)
Let's do it a little bit faster. I need to go for some reasons.

Answer 11

Ahh ok so it would be -6x and -2?

Answer 12

Yes. Then, combine them all. And mix up similar terms. Therefore?

Answer 13

9x^2 + 3x - 6x - 2?

Answer 14

9x^2 - 6x - 2?