Question

determine as raizes das equaçoes

a- x² +14x
b-x² -6x
c-x²+12x
d-x²-5x

Answer 1

Olá!!!

Resolução!!!

a)
x² + 14x = 0
x • ( x + 14 ) = 0
x' = 0

x + 14 = 0
x" = - 14

S = { - 14, 0 }

b)
x² - 6x = 0
x • ( x - 6 ) = 0
x' = 0

x - 6 = 0
x" = 6

S = { 0, 6 }

c)
x² + 12x = 0
x • ( x + 12 ) = 0
x' = 0

x + 12 = 0
x" = - 12

S = { - 12, 0 }

d)
x² - 5x = 0
x • ( x - 15 ) = 0
x' = 0

x - 15 = 0
x" = 15

S = { 0, 15 }

Espero ter ajudado!!!