Question

encontre a raiz imaginaria de x2 -18x + 82= 0

Answer 1

a= 1 b= -18 c = 82

 Δ = b² - 4ac
Δ = -324 - 4 . 1 . 82
Δ=- 324 -328
Δ= 4

$\frac{-(-18) + - \sqrt{4} }{2 . 1}$

$\frac{+18 + - 2}{2}$

x' = $\frac{18+2}{2} = 10$

x'' = $\frac{18-2}{2} =8$