Question

Вычислите дискриминант уравнения -5t2+40t-60=0

Answer 1

a = -5
b = 40
c = -60
D = b^2 - 4ac
D = 40^2 - 4 * (-5) * (-60) = 1600 - 1200 = 400

Answer 2

- 5t² + 40t - 60 = 0
5t² - 40t + 60 = 0
D = b² - 4ac
D = ( - 40)² - 4 × 5 × 60 = 1600 - 1200 = 400 = 20²