Question

Expand and simplify (3a-2)(4a-5)

Answer 1

(3a - 2)(4a - 5) = 3a(4a - 5) - 2(4a - 5)
Can you solve this?

Answer 2

Nope :(

Answer 3

Let's start with this.
3a(4a - 5)
Can you solve this?

Answer 4

No the problem is i just really dont get how to do the whole expand and simplify thing :(

Answer 5

Ok. So, you don't know how to FOIL?

Answer 6

Noo

Answer 7

First
Outside
Inside
Last
So first, multiply 3a and 4a together.

Answer 8

Okay so thats 12a?

Answer 9

That's 12a^2 + a x a = a^2 remember?

Answer 10

Yeahh

Answer 11

First: 12a^2
Outside
Inside
Last
Now, multiply 3a and -5

Answer 12

-15a?

Answer 13

???

Answer 14

Alright, that's right.
First: 12a^2
Outside: -15a
Inside
Last
Now multiply -2 and 4a

Answer 15

-8a??

Answer 16

Ok. That's it.
First: 12a^2
Outside: -15a
Inside: -8a
Last
Now finally, -2 times -5

Answer 17

10

Answer 18

Ok.
First: 12a^2
Outside: -15a
Inside: -8a
Last: 10
Now combine.
12a^2 - 15a - 8a + 10 = 12a^2 - 23a + 10
12a^2 - 23a + 10 is the answer. Do you see hwat terms you have to multiply now? Look at the order I told you to multiply things and where it is in the multiplication.
First: 12a^2
Outside: -15a
Inside: -8a
Last: 10
(3a - 2)(4a - 5)

Answer 19

Thank you so much!!!

Answer 20

np :]