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

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Answer 1 · 2015-07-26T18:15:14

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

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

What is the discriminant of 20 – x^2 = –5x20 – x^2 = –5x and what does that mean?