21.One factor of $(3a+5)^2 + 6(3a+5) - 16$ is A) $(3a + 13)$ B) $(3a - 2)$ C) $(3a - 3)$ D) $(3a - 16)$
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Substitute $x$ into the given expression: $(3a+5)^2 + 6(3a+5) - 16 = x^2 + 6x - 16$. Show more…
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