Question 333041
The discriminant is the name given to the expression that appears under the square root (radical) sign in the quadratic formula.

So, b^2 - 4ac is the discriminant.

Let a = -10, b = -6 and c = 5.

(-6)^2 - 4(-10)(5) = 

36 + 40(5) = 

36 + 200 = 236

If the discriminant is a positive number (and it is because 236 is a positive number), then there are two real solutions.

Understand?