The terms in x in the factorisation must be 3 and 1, the whole numbers must be factors of 48 ie 1/48, 2/24, 3/16, 4/12, or 6/8. The only ones which can combine with the 3 to give a sum of 24 are 4 and 12 viz:
(3x + 12)(x + 4)
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3(2) + 24x + 48 = 0 6 + 24x + 48 = 0 24x + 54 = 0 24x + 54 - 54 = 0 - 54 24x = -54 24x/24 = -54/24 x = -9/4 x = -2 1/4
factor the trinomial 16x^2+24x+9
You must add (17n + 144).
6*3-6*2-12x v v 18 - 12-12x v v 6-24x -6 -6 something like that..
6x(1+4)