Examples of using Rational expression in English and their translations into Thai
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Colloquial
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Ecclesiastic
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Ecclesiastic
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Computer
That's the simplified rational expression.
The simplified rational expression is just x plus 4 over x plus 6.
The same exact idea applies to rational expressions.
Simplify the rational expression and state the domain.
You know, this doesn't look like a rational expression.
Simplify the rational expression and state the domain.
With that stated, let's actually multiply and simplify this rational expression.
So we're subtracting one rational expression from another.
We have two rational expressions, and we're subtracting one from the other.
A more interesting question is what are the x values that will make this rational expression undefined?
So when you multiply any rational expressions, it's just like multiplying any fractions.
It's going to go make the denominator equal to 0, and it would make the entire rational expression undefined.
We actually have one rational expression divided by another rational expression.
So in both situations, p being equal to negative 5 would make either of these rational expressions undefined.
Now we see that that numerator in this rational expression does have a lower degree than the denominator.
You could actually divide this rational expression, and you will get something like 1/x plus something, something, something, and then you would also see, oh, well, the limit as x approaches infinity of 1/x is also 0.
Express the answer as a simplified rational expression, and state the domains.
The first thing to do with any of these rational expressions that you want to decompose is to just make sure that the numerator is of a lower degree than the denominator, and if it's not, then you just do the algebraic long division like we did in the first video.
Let's rewrite both of these expressions or write this entire rational expression with the numerator and the denominator factored.
So if we were to write this rational expression in lowest terms, we could say that this is equal to 3/4.
But what makes this irrational is you can't represent it as a ratio, or as a rational expression, of integers, the way you can for rational numbers.
So whenever you have any type of rational expression like this being greater than 0, there's two situations in which it will be true.
And like we have seen multiple times before, these rational expressions aren't defined when their denominators are equal to 0.
When you divide by a fraction or a rational expression, it's the same thing as multiplying by the inverse.
Now one thing you might say is well, if I have a rational expression like this, maybe I multiply both sides of this equation by x plus 2.
Well, anyway, the next step if we really want to decompose this rational expression is to figure out what this part of it is, and the way to do that is with algebraic long division.