2 answers:
(m - 3m)^2
(m - 3n)(m - 3n)
Use the FOIL method.
First m^2
Outer -3mn
Inner -3mn
Last 9n^2
Equation form:
m^2 - 3mn - 3mn + 9n^2
Simplify terms to get...
m^2 - 6mn + 9n^2
The answer is answer D, m^2 - 6mn + 9n^2.
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