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

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

- 5t² + 40t - 60 = 05t² - 40t + 60 = 0D = b² - 4ac D = ( - 40)² - 4 × 5 × 60 = 1600 - 1200 = 400 = 20²