(6x - 3)(x + 5) which becomes 3.(2x - 1)(x + 5)
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The GCF is 27.
a2 + 28a + 27 = 0 (a + 1)(a + 27) = 0 a = -1 or -27 However, the second line is the factorised form, the third is what a is equal to
With great difficulty not knowing if 6x and 27 are plus or minus
Since 3 is a factor of 27, it is automatically the GCF of 3 and 27
The grouping of the factors of w^2 + 30w + 81 (a perfect square) is (w + 27) and (w + 3)3 is a prime factor of 27, 30 and 81 but without two terms to compare, there won't be a GCF (not gfc)