Answer:
Given the equation: 
The general equation of quadratic formula for
where a, b and c are constant;
then, the solution for this equation is given by;
......[1]
From the equation,
we have
a =2, b=14 and c=16
Substitute these values in [1] to solve for x;
or

Simplify:

then,
and

Therefore, the solutions for the given equation is; x =-2 and 