24=2x(x+3)
24=2(x^2)+6x
2(x^2)+6x-24=0 simplifying
(x^2)+3X-12=0 well this one can only be solved using the formula for quadratic equations.
if a(x^2)+bx+c=0, then x=(-b(+or-)sqaureroot of((b^2)-4ac))/2a
in the equation, a=1,b=3and c=-12
therefore
x=(-3+squareroot of (9+48))/2 or x=(-3-squareroot of (9+48))/2
therefore
x=(-3+squreroot of57)/2 or x=(-3-squreroot of57)/2
x=(-3+7.55)/2 or x=(-3-7.55)/2
then x=2.27 or x=-5.27