Question

X(x-3)=54; уравнения

Answer 1

Ответ:

x² - 3x - 54 = 0

D = b² - 4ac = 9 - 4 ×(- 54 )= 9 + 216 = 225 = 15²

x1 = ( 3 + 15)/2 = 9

x2 = ( 3 - 15) / 2 = - 6

Ответ: x1 = 9, x2 = - 6