Question

Resolva as equações:

a) |x x+2| = 0
|5 7|

b) |x x| = -2
|3 x|

Answer 1

Oi Joaquim

a)

|x x+2| = 0
|5 7|

7x - 5x - 10 = 0

2x = 10
x = 5 

b)

|x x| = -2
|3 x|

x² - 3x + 2 = 0

delta
d² = 9 - 8 = 1
d = 1

x1 = (3 + 1)/2 = 4/2 = 2
x2 = (3 - 1)/2 = 2/2 = 1

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