Factorise.
5y2+ 5y 10
[\ 5 y^2 + 5y - 10]
[ = 5 y^2 + 10y - 5y - 10]
[ = 5y\left( y + 2 \right) - 5 \left( y + 2 \right)]
[ = \left( 5y - 5 \right)\left( y + 2 \right)]
[ = 5\left( y - 1 \right)\left( y + 2 \right)]
