Question

(5a-3)(2a+4)

Answer 1

What are you trying to do with this?

Answer 2

Multiply

Answer 3

I foiil?

Answer 4

Yes:)

Answer 5

and what do you get?

Answer 6

1080?

Answer 7

If you foil it then you would get \[10a ^{2}+14a-12\]

Answer 8

Do you understand how I got that?

Answer 9

No how'd you get that?

Answer 10

Ok so the original problem is (5a-3)(2a+4).
Foil stands for First, Outside, Inside, and Last.
So, you would start by multiplying the first two terms.

Answer 11

\[5a \times 2a\] 5 x 2 = 10
a x a = \[a ^{2}\]

Answer 12

Outside: 5a x 4 = 20a
Inside: -3 x 2a = -6a
Last: -3 x 4 = 12

Answer 13

put it together and you have
\[10a ^{2}+20a-6a-12\]

Answer 14

combine like terms
20a - 6a = 14a

Answer 15

Yo wait I had that but instead I wrote 10a+20a+(-6a)+(-12)
I think adding the positive sign messed me up

Answer 16

ok then:) don't forget that it's \[10a ^{2}\] not 10a

Answer 17

so thats 100 right?

Answer 18

no the answer is 10a^2 +14a−12 unless you know what a is or what to replace it with you cannot get an answer without a variable.

Answer 19

do you understand that?

Answer 20

Yeah I get it now, Thank you

Answer 21

You're welcome:)