Answer:
-124
Step-by-step explanation:
The equation for a discriminant is:
[tex]b^{2} -4ac[/tex]
So for
[tex]7x^{2} -4x +5=0[/tex]
a = 7 b = - 4 c = 5
Plug values into the equation.
[tex](-4)^{2} -4(7)(5)[/tex]
16 - 140 = -124
Answer:-124
b^2 - 4ac
a = 7 b = -4 c = 5
-4^2 - 4*7*5
16 - 4*35
16 - 140
