Question

Calcule as raízes das equações

X =
−b ± √b2 − 4ac
2a

a) X2 - X – 20 = 0
b) - 2X2 + 6X + 8 = 0
c) 3X2 - 5X – 2 = 0
d) – X2 + 8X – 7 = 0
e) 2X2 - 7X + 3 = 0

Complete com os valores de X1 e X2

a) X1 _______ e X2 ________

b) X1________ e X2 _______

c) X1________ e X2 _______

d) X1________ e X2 _______

e) X1________ e X2 _______

Answer 1

Resposta:

a)x1= 5 e x2= -4

b)x1= -4 e x2= 1

c)x1= 2 e x2=-1/3

d)x1= 1 e x2= 7

e)x1= 3 e x2=1/2

Explicação passo a passo: