Question

resolva a equação(y+2)²-2x-8=0

Answer 1

Ola Graziely

(y + 2)² - 2x - 8 = 0

2x = (y + 2)² - 8

2x = y² + 4y + 4 - 8

2x = (y² + 4y - 4)

x = (y² + 4y - 4)/2 

y² + 4y - 4 = 0

delta
d² = 16 + 16 = 32
d = 4√2

y1 = (-4 + 4√2)/2 = -2 + 2√2
y2 = (-4 - 4√2)/2 = -2 - 2√2

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