Question

Resolver a equaçao 2 grau x^2 + 81 = 0

Answer 1

delta=b^2-4ac
delta=81^2-4.1.0
delta=6.561-0
delta=6.561

x=-b+/-raiz de delta/2.a
x=-81+/-raiz de 6.561/2.1
x=-81+/-81/2
x1=-81+81/2             x2=-81-81/2
x1=0/2=o                 x2=-162/2=-81