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9(1 + 4)
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9(4 + 5)
9 + 36 = (9 x 1) + (9 x 4) = 9 x 5 = 45
24 + 39 = (3 x 8) + (3 x 13) = 3 x 21 = 63
GCF(18, 27) = 9so, 18 + 27 = 9*2 + 9*3 = 9*(2 + 3) = 9*5 = 45.
(x + 9)(x + 4)