Answer
$(3x+2)(x+4)$
Work Step by Step
Using factoring, we find:
$14x=12x+2x$
$3x^2+14x+8=3x^2+12x+2x+8=(3x)x+(3x)4+(2)x+(2)4=3x(x+4)+2(x+4)=(3x+2)(x+4)$
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