Question

2y square +3root5y-10

Answer 1

$2 {y}^{2} + 3 \sqrt{5} y - 10 = 0$
$2 {y}^{2} + 4 \sqrt{5} y - \sqrt{5} - 10 = 0$
$2y(y + 2 \sqrt{5} ) - \sqrt{5} (y + 2 \sqrt{5} ) = 0$
$(2y - \sqrt{5} )(y + 2 \sqrt{5} ) = 0$
$hence \: y = \frac{ \sqrt{5} }{2} \: or \: y = - 2 \sqrt{5}$