Question

Simplify the following expressions by adding or subtracting like terms or just rewrite the expression of its already simplified

Answer 1

The first expression is

`2x+3.2x-1`

We have to reduce like terms

`(2+3.2-1)x=4.2x`

The first answer is 4.2x

The second expression is

`3a+4b+2a-9b=3a+2a+4b-9b=5a-5b=5(a-b)`

The third expression is

`3a+5ab=a(3+5b)`

Observe that in the third expression we only factored out the greatest common factor which was a.