To solve this problem you must apply the proccedure shown below:
1. You have the following quadratic equation, which is given in the problem above:
2y^2+6y-8=0
2. So, to solve it, you can use the quadratic formula, which is:
y=(-b±√(b²-4ac))/2a
a=2
b=6
c=-8
3. When you susbtitute these values into the formula, you obtain:
y1=-4
y2=1