Question

x2 +2x-15 sobre x2-2x-3

Answer 1

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Ola Rhay

x² + 2x - 15

delta
d² = 4 + 60 = 64
d = 8

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

x² + 2x - 15 = (x - 3)*(x + 5)

x² - 2x - 3 

delta
d² = 4 + 12 = 16
d = 4

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

x² - 2x - 3 = (x - 3)*(x + 1)

(x² + 2x - 15)/(x² - 2x - 3 ) = (x - 3)*(x + 5)/(x - 3)*(x + 1) = (x + 5)/(x + 1) 

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