Question

Factor 9m^2-66m+21 completely

Answer 1

STEP ONE: Raise 'm' to the 2nd power. 

STEP TWO: Simplify $9m ^{2} -66m + 21$.

FINAL ANSWER: $3(m - 7) * (3m-1).$

Answer 2

$9m ^{2} -63m-3m+21$
$9m(m-7)-3(m-7)$
Answer: $(9m-3)(m-7)$