Question 1016401
The discriminant is found from the quadratic in standard form as b^2 - 4ac.
Let's get this guy in standard form...
t^2 - 5t - 7 = 0
so that
b^2 - 4ac = (-5)^2 - 4(1)(-7) = 25 + 28 = 53
That tells us we have two real roots.