Question

1) Determine as raízes das equações abaixo:
a) x²-222 x=0
b) x²+666 x=0
c) x²-1230 x=0
d) 2x²-999 x=0
e) 2x²-160 x=0

Answer 1

Vamos là.

a)

x² - 222x = 0

x*(x - 222) = 0

x1 = 0, x2 = 222

b)

x² + 666x = 0

x*(x + 666) = 0

x1 = 0, x2 = -666

c)

x² - 1230x = 0

x*(x - 1230) = 0

x1 = 0, x2 = 1230

d)

2x² - 999x = 0

x*(2x - 999) = 0

x1 = 0, x2 = 999/2

e)

x² - 80x = 0

x*(x - 80) = 0

x1 = 0, x2 = 80