D.
4(2x - 3)(2x + 1)
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4x times 4x equals 16x2.
factor the trinomial 16x^2+24x+9
4(1 - 4x + 7y)
16x^2 - 25 Recognise that both 16 and 25 are squared numbers, 16 = 4^(2) & 25 = 5^(2) Substituting 4^(2)x^(2) - 5^(2) = > (4x)^(2) - 5^(2) We now have two squared terms with a negative between them. NB two squared terms with positive does NOT factor. Factoring (4x - 5)(4x + 5)
[(-16x)12]1/3 = (-16x)4 = 65536x4