Question

x²-17x=70
решите пжжжжж​

Answer 1

Ответ:

x2 - 17x = 70

x2 - 17x - 70 = 0

a=1 b= -17 c= -70

D= 289 - 4 × 1× (-70)= 289 + 280 = 569 √ 23,8

x1 = 17 - 23,8 : 2 = - 3,4

x2 = 17 + 23,8 :2 = 20,4