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