Question 36185
As I posted earlier on a similar problem, just calculate {{{b^2 - 4ac}}}, where in this case, {{{5x^2 + 8x + 7 = 0}}}, a =5, b= 8, and c= 7.


{{{b^2 - 4ac}}}
{{{8^2 - 4*5*7}}}
{{{64-140}}}
{{{-76}}}


Since this discriminant is less than 0, there will be NO REAL solutions.  The solutions will be complex.  


R^2 at SCC