Вычислите дискриминант уравнения -5t2+40t-60=0
- 5t² + 40t - 60 = 0 5t² - 40t + 60 = 0 D = b² - 4ac D = ( - 40)² - 4 × 5 × 60 = 1600 - 1200 = 400 = 20²
A = -5 b = 40 c = -60 D = b^2 - 4ac D = 40^2 - 4 * (-5) * (-60) = 1600 - 1200 = 400