Answer
$ (3x+2)(x+1) $
Work Step by Step
Factoring by grouping:
1. Multiply the leading coefficient, a, and the constant, c.
2. Find the factors of ac whose sum is b.
3. Rewrite the middle term, bx, as a sum or difference using the factors from step 2.
4. Factor by grouping
---
Always start by searching for a GCF.... none (other than 1).
1. $ac=6$
2. sum = 5... factors: 2 and 3
3.
$3x^{2}+5x+2=(3x^{2}+3x)+(2x+2)$
4.
... $=3x(x+1)+2(x+1)$
$=(3x+2)(x+1)$
Check by FOIL$\qquad (3x+2)(x+1) $=
$F:\quad 3x^{2}$
$O:\quad +3x$
$I:\quad +2x$
$L:\quad +2$
$ (3x+2)(x+1) $= $3x^{2}+5x+2$
