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peggycab4201
15.11.2019 •
Mathematics
Mr. bill purchased 3 packs of erasers what is the prime fraction of the total eraser number
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Ответ:
Ответ:
y =
(x + 2)²
Step-by-step explanation:
Any point on the parabola (x, y) is equidistant from the focus and directrix.
Using the distance formula
Square both sides
(x + 2)² + (y - 3)² = (y + 3)² ← expand the factors in y
(x + 2)² + y² - 6y + 9 = y² + 6y + 9 ← subtract y² + 6y + 9 from both sides
(x + 2)² - 12y = 0 ← subtract (x + 2)² from both sides
- 12y = - (x + 2)² ( divide both sides by - 12 )
y =
(x + 2)²