# What is the square root of #0.4# ?

At this point, we can justify the denominator:

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The principal square root is usually meant to be referred to when the phrase "the square root of..." is used.

We can take the following steps to determine the most basic algebraic form:

Reasonable approximations

Then, we can cut this short early to obtain a reasonable approximation, for example:

Instead of laboriously breaking down such a fraction, we can use an integer sequence defined recursively by:

To begin with:

So:

So:

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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.

- What is the vertex of # y= -(x-6)^2-4x^2-2x-2#?
- How do you write a quadratic equation with vertex (-1, 4) and point (-3, - 4)?
- What is the discriminant of #x^2-10x+25# and what does that mean?
- How do you evaluate #\sqrt { 2x - 1} = \sqrt { x + 8}#?
- How do you find the vertex and axis of symmetry, and then graph the parabola given by: # y = –x^2 + 4x + 2#?

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