Question

EXERCÍCIO 01
Resolva as equações do 2º grau:
a) x-x=0
b) x2 + 6x = 0
c) x - 2x=0
d) x² -5x=0
e) 2x²+ x=0​

Answer 1

Oi....

a)

x² - x = 0

x(x - 1) = 0

x' = 0

x - 1 = 0

x" = 1

S = {0; 1}

b)

x² +  6x = 0

x(x + 6) = 0

x' = 0

x + 6 = 0

x" = - 6

S= {0, - 6}

c)

x² - 2x = 0

x(x - 2) = 0

x' = 0

x - 2 = 0

x" = 2

S= {0; 2}

d)

x² - 5x = 0

x(x - 5) = 0

x' = 0

x - 5 = 0

x" = 5

S= {0; 5}

e)

2x²+ x=0​

x(2x + 1) = 0

x' = 0

2x + 1 = 0

2x = - 1

x" = - 1/2

S= {0; - 1/2}

Bons estudos.