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

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Answer 1 · 2016-06-28T19:49:23

$3(m+3)(m-3)$

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

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

= $3(m+3)(m-3)$

How do you factor 3m^2 - 273m^2 - 27?