Question

Calcule as raizes

1)x²-5x+6=2

2)x²-5x+6=90

Answer 1

Olá Mateus

1) x² - 5x + 6 = 2

x² - 5x + 4 = 0

delta
d² = 25 - 16 = 9
d = 3

x1 = (5 + 3)/2 = 8/2 = 4
x2 = (5 - 3)/2 = 2/2 = 1

2)

x²  - 5x + 6 = 90 
x²  - 5x - 84 = 0

delta
d² = 25 + 4*84 = 361
d = 19

x1 = (5 + 19)/2 = 24/2 = 12
x2 = (5 - 19)/2 = -14/2 = -7 

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