Equação de segundo grau pfvr !!!
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a=2
b=3
c=-2
Delta=b2-4ac
D= 2 (2) -4×2×-2
D= 4+16
D=20
X=-b+- raiz d delta/2×a
X=-3+- raiz de 20/2×2
X=-3+-4,472/4
X1= -3+4,472/4 = 1,472/4 = 0,368
X2= -3-4,472/4 = -7,472/4 = 1,868
b=3
c=-2
Delta=b2-4ac
D= 2 (2) -4×2×-2
D= 4+16
D=20
X=-b+- raiz d delta/2×a
X=-3+- raiz de 20/2×2
X=-3+-4,472/4
X1= -3+4,472/4 = 1,472/4 = 0,368
X2= -3-4,472/4 = -7,472/4 = 1,868
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