Posted by LIZY on .
use the discriminant to determine whether the following equation have solutions that are : two different rational solutions : two different irrational solutions : exactly one rational solution : or two different imaginary solutions
7+5z^2=8z

MATH 
Steve,
rearrange to the more usual form:
5z^2 + 8z + 7 = 0
the discriminant is 8^24*5*7 < 0
So, what does that tell you about the roots?