Because the focus is (-2,-2) and the directrix is y = -4, the vertex is (-2,-3).
Consider an arbitrary point (x,y) on the parabola.
The square of the distance between the focus and P is
(y+2)² + (x+2)²
The square of the distance from the point to the directrix is
(y+4)²
Therefore
(y+4)² = (y+2)² + (x+2)²
y² + 8y + 16 = y² + 4y + 4 + (x+2)²
4y = (x+2)² - 12
y = (1/4)(x+2)² - 3
Answer:
What is the shape of the base of the pyramid?
Answer:
24in
Step-by-step explanation:
18+6=24
30:60:90
3:6:9
1:2:3
I can’t make sense of given answers
<span>x+(2x-4)=11
Answer is x=5.</span>