# How do you find the vertex, directrix and focus of #y= -3(x+1)^2 - 4#?

Vertex is at

focus is at

from focus and directrix situated downside and upper side of the

vertex. Distance of the directrix from vertex is

graph{-3(x+1)^2-4 [-40, 40, -20, 20]} [Ans]

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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- Write the equation given the vertex is (-1,4) and the directrix line is x=1. help please?
- How to answer these two questions ?

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