Question

WORTH 50 POINTS!

can you please help me with 12 and 15?
(SHOW WORK IF POSSIBLE!)
PLEASE AND THANK YOUU!!!​

Answer 1

Hi, I know number 15 but can't twist my finger around 12 sorry.

Explanation:

Anyways. The expression
`8a^2-4b+7a^2` and
`5\left(3a^2-2b\right)` are in fact not equivalent.

Show your work:

The expression
`8a^2-4b+7a^2` is worked out like this:

`8a^2-4b+7a^2`

`=8a^2+ -4b+7a^2`

Combine Like Terms:

`8a^2-4b+7a^2`

=
`(8a^(2) + 7a^(2)) + (-4b)`

`15a^(2) + -4b`

Answer:


`15a^(2) + -4b`

While the expression
`5\left(3a^2-2b\right)` is worked out like this:

`5\left(3a^2-2b\right)`

`=(5)(3a^(2) + -2b)`

`=(5)(3a^(2) )+(5) (-2b)`

Answer:

`15a^(2) - 10b`

So the expressions are not equivalent.

Hope this helped!