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By using the F.O.I.L method: , the question is binomial so the answer will be trinomial;

First = m²

Outer = -3

Inner = 4m

Last = -12

so the answer should be :__m² - 1m - 12__ . not m² + m - 12 . .

because when you solve the Outer -3 & Inner +4 , it has different sign so the sign will be -(negative) so that's why the result is -1m not m only . .

:)),

First = m²

Outer = -3

Inner = 4m

Last = -12

so the answer should be :

because when you solve the Outer -3 & Inner +4 , it has different sign so the sign will be -(negative) so that's why the result is -1m not m only . .

:)),