Question

Subtract.(6a² + 7a + 9) - (a + 4)

Answer 1

`(6a^2+7a+9)-(a+4)`

We will start to add the like terms

Remember (-)(+) = (-)

`6a^2+7a+9-(a+4)=6a^2+7a+9-a-4`

The like terms are 7a and -a, 9 and -4

`6a^2+7a+9-a-4=6a^2+(7a-a)+(9-4)`
`6a^2+(7a-a)+(9-4)=6a^2+6a+5`

The answer is

`6a^2+6a+5`