Factor 7xy+28x^3+y+4x^2

$7 x y + 28 x^{3} + y + 4 x^{2}$

Factor out the greatest common factor from each group.

Group the first two terms and the last two terms.

$(7 x y + 28 x^{3}) + y + 4 x^{2}$

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

$7 x (y + 4 x^{2}) + 1 (y + 4 x^{2})$

Factor the polynomial by factoring out the greatest common factor, $y + 4 x^{2}$ .

$(y + 4 x^{2}) (7 x + 1)$