Question

How do you factor `3m^2 - 27`?

Answer 1

`3(m+3)(m-3)`

Explanation:

When you factorise, always look for a common factor first.
Both terms can be divided by 3.

`3m^2 -27 = 3(m^2 -9) " this gives difference of squares"`

=`3(m+3)(m-3)`