Factor by Grouping 49r^3+42r^2-42r-36

$49 r^{3} + 42 r^{2} - 42 r - 36$

Step 1

Factor out the greatest common factor from each group.

Group the first two terms and the last two terms.

$(49 r^{3} + 42 r^{2}) - 42 r - 36$

Factor out the greatest common factor (GCF) from each group.

$7 r^{2} (7 r + 6) - 6 (7 r + 6)$

Step 2

Factor the polynomial by factoring out the greatest common factor, $7 r + 6$ .

$(7 r + 6) (7 r^{2} - 6)$