Question

(y^2+ 5y) (y^2+5y -2) - 24

Answer 1

$\bold {( {y}^{2} + 5y)({y}^{2} + 5y - 2) - 24}$

$\small \bold {( {y}^{2} + 5y - 2) \times {y}^{2} + 5y( {y}^{2} + 5y - 2) - 24}$

$\small \bold{{y}^{4} + 5 {y}^{3} - 2 {y}^{2} + 5y \: ( {y}^{2} + 5y - 2) - 24}$

$\small \bold{ {y}^{4} + 5 {y}^{3} - 2 {y}^{2} + 5 {y}^{3} + 25 {y}^{2} - 10y - 24}$

$\small \bold{ {y}^{4} + 10 {y}^{3} - 2y {}^{2} + 25 {y}^{2} - 10y - 24}$

$\bold{{y}^{4} + 10 {y}^{3} + 23 {y}^{2} - 10y - 24}$