Question

Help with this problem for number 10

Answer 1

`(1)/(2)(a-1)`

Explanation:

We have to factor out a coefficient that is common to both the terms.

Looking at the problem:

`(1)/(2)a-(1)/(2)`

We can see that we can take out
`(1)/(2)` from both the terms. Taking out, or taking common means to divide:

`((1)/(2)a)/((1)/(2))=a`

and

`((1)/(2))/((1)/(2))=1`

Thus, we have:

`(1)/(2)a-(1)/(2)\\=(1)/(2)(a-1)`

This is the simplified form.