(3r - 2)(3r - 2) or (3r - 2) squared.
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That factors to 3(r - 5)(r + 1) r = 5, -1
(r + 9)(r + 3)
-1r
12r + 4 = 112, 12r = 108, r = 9
r^2 - 12r + 27 what two factors of 27 add up to - 12? (r - 3)(r - 9) FOIL that and get the quadratic polynomial back