Question

What is the value of the discriminant for the quadratic equation -3 = -x^2 + 2x? Discriminant = b^2-4ac

Answer 1

-3 = -x² + 2x

x² - 2x - 3 = 0

x² - 3x + x - 3 = 0

x (x - 3) - 1 (x - 3) = 0

x = 1, 3

Discriminant = (-2)² - 4 × 1 × (-3)

= 4 + 12 = 16