Question

Equaçao Do Segundo GRAU
x²+81x=0

Answer 1

x²+81x=0

a=1
b=81
c=0

Δ=b²-4.a.c
Δ=81²-4.1.0
Δ=6561-0
Δ=6561

x=-b+-√Δ/2.a

x'=-81+81/2.1
x'=0/2
x'=0

x''=-81-81/2.1
x''=-162/2
x''=81

Answer 2

x² + 81x = 0
81² - 4.1.0 
= 6561
- 81  +/- √¯6561
-----------------------
          2.1

x' = -81 + 81 = 0
x''= -81 - 81 = 162 / 2 = - 81