Combine Like Terms & Distributive Property

Combine Like Terms.

 $5a+2b-3a+4$  

•  $8a+2b+4$  

•  $8ab$  

•  $2a+2b+4$  

•  $4ab+4$  

When using distributive property to simplify
 $-\left(n-5\right)$ 

you can place a ______ behind the negative.

Why is  $8\left(-2n+5\right)\$  NOT equal to  $-16n+5$  ?  

Explain the mistake made in a complete sentence.

Identify the like terms.
 $-a-8-12a^2+4$  

Like terms can have different _______ but have the same _________ and _________.

"Only numbers" describe __________.