Question

How do you factor `g^2-9`?

Answer 1

The factorised form for the expression is:
`color(green)((g+3)(g-3)`

Explanation:

As per property:
`color(green)(a^2-b^2=(a+b)(a-b)`

Applying the above to the expression provided:

`g^2-9=g^2-3^2`

Here, `color(green)(a)=g, color(green)(b)=3`

So,
`g^2-9=color(green)((g+3)(g-3)`