Задача 48627 ...

viernes

2020-04-27 22:20:18

Реши уравнение x^2 + 30x - 5 = 0.

〇 x1 = 0; x2 = -15 + √230

〇 x1 = -15 + √230

〇 x1 = -15 - √230; x2 = -15 + √230

u821511235

2020-04-27 22:40:12

★

х^(2)+30x–5=0,
D=900+20=920=(2√230)^2,
x=(–30 ±2√230)/2,
x=–15 ±√230,
х1=–15–√230, х2=–15+√230.
Ответ: –15–√230, –15+√230.