Question

Factor 121m^2-198m+81

Answer 1

1) Rewrite it in the form a^2-2ab+b^2, where a=11m and b=9

(11m)^2-2(11m)(9)+9^2

2) Use Square of Difference: (a-b)^2=a^2-2ab+b^2

(11m-9)^2

Your answer is (11m-9)^2