Question

What is the discriminant of `20 – x^2 = –5x` and what does that mean?

Answer 1

Solve `20 - x^2 = - 5x`

Explanation:

x^2 - 5x - 20 = 0
D = b^2 - 4ac = 25 + 80 = 105 >0
This means there are 2 real roots (2 x-intercepts)