Question

Resolva as equações do 2º grau incompletas:

a) X² + 5X = 0






b) X² - 6X = 0






c) X² - 49 = 0







d) X² - 64 = 0
​

Answer 1

Resposta:

a) x(x+5)=0

x=0

x+5=0

x= -5 S={-5,0}

b) x(x-6)=0

x=0

x-6=0

x=6 S={0,6}

c) x^2=49

x=✓49

x=7. S={-7,7}

d) x^2=64

x=✓64

x=8. S={-8,8}