Question

Simplify: (3a – 4b)(a + b)

Answer 1

@butterflydreamer

Answer 2

3a^2-4ab+3ab-4b^2

Answer 3

its better?

Answer 4

kinda, could you please walk me through the steps?

Answer 5

This looks like some FOILing c;

Answer 6

yep it is!

Answer 7

@Bananas1234

What you're going to have to do is something called FOIL.

FOIL is

First
Outer
Inner
Last

Answer 8

It's basically where you multiply both of the first terms, then you multiply both of the outer terms, then you multiply the inner terms, then you multiply the last terms. Then you add/subtract any like terms

Answer 9

(3a – 4b)(a + b)

3a(a) + 3a(b) -4b(a) -4b(b)

Answer 10

(If weird black diamonds show up, just refresh your page...this happened to me so I'm just going to do that now xD).

Answer 11

3a(a) + 3a(b) -4b(a) -4b(b)

So then just multiply the terms together, then add like terms

Answer 12

You should get 3a^2 + 3ab -4ba - 4b^2

Answer 13

@Ziferot It seems you did "Inner" in place of "Outer."

While that doesn't really matter in the case of this problem, I'd suggest that you don't do that as in other cases, the order in which you do Inner and Outer can change the outcome of a problem.

Answer 14

@Bananas1234 If you need any more help, msg me :)

Answer 15

Why the plethora of people on this question? Haha, I believe it has already been answered, my dear friends :)

Answer 16

Thank you! I think I understand it now.

Answer 17

No problem :)

Answer 18

Sorry if I went off a cupple times my Internet was going in and out for awhile there. :)

Answer 19

It's all good brudduh ;P