Question

URGENTE !!!!!
(X+1)2-x=7 e (x-1)2=x+5

Answer 1

Ola

(x + 1)² - x = 7

x² + 2x + 1 - x = 7

x² + x - 6 = 0

delta
d² = 1 + 24 = 25
d = 5

x1 = (-1 + 5)/2 = 4/2 = 2
x2 = (-1 - 5)/2 = -6/2 = -3

...

(x - 1)² = x + 5

x² - 2x + 1 = x + 5

x² - 3x - 4 = 0

delta
d² = 9 + 16 = 25
d = 5

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

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