Question

Formula Bascara.
10x²+30x-3=0

Answer 1

10x² + 30x - 3 = 0

a = 10
b = 30
c = - 3

Δ = b² - 4.a.c
Δ = 30² - 4 . 10 . ( - 3)
Δ = 900 + 120
Δ = 1020

x = - b + - √Δ/2a
x = - 30 + - √1020/ 2. 10
x = - 30 + - 31,937439 / 20

x' = - 30 - 31,937439/20 ⇒ x' = - 61,937439/20 ⇒ x' = - 3,096872 ⇒ x' = ≈ - 3,10
x" = - 30 + 31,937439/20 ⇒ x" = 1,937439/20 ⇒ x" = 0,096872 ⇒x" = ≈ 0,10

S = { - 3,10  e  0,10  }