Calculate zeros in the denominator of rational expressions, Mathematics

Assignment Help:

About Zeros in the Denominator of Rational Expressions

One thing that you must be careful about when working with rational expressions is that the denominator can never be zero. Division by zero is undefined. So any values for the variables that would make the denominator zero must be excluded from the domain of the expression.

Let me show you what I mean by this. You should carefully study the following examples.

For the following, state the values of the variable that must be excluded from the rational expression:

2x -3/x2-3x-10

Solution: Again, exclude the values for which the denominator, or
x2 - 3x - 10 = 0:
x2 - 3x -10 = 0
(x - 5)(x +2) = 0
x - 5 = 0 or x + 2= 0
x = 5 or -2
So this means that x = 5 and x = -2.

 

 


Related Discussions:- Calculate zeros in the denominator of rational expressions

The null hypothesis, The null hypothesis It is the hypothesis being tes...

The null hypothesis It is the hypothesis being tested, the belief of a specific characteristic for illustration, US Bureau of Standards may walk to a sugar making company along

Find out the mean wait in line - probability, Example of Probability I...

Example of Probability Illustration:  It has been determined that the probability density function for the wait in line at a counter is specified by, In which t is the

Math, The Timbuktu post office has only 3 cents and 7 cents stamps having r...

The Timbuktu post office has only 3 cents and 7 cents stamps having run out of all other denominations. What are the six amounts of postage that cannot be created? How do you know

Simple harmonic motion, prove that the composition of two simple harmonic o...

prove that the composition of two simple harmonic of the same period and in the same straight line is also a simple harmonic motion of the same period.

Approximating solutions to equations newtons method, Approximating solution...

Approximating solutions to equations : In this section we will look at a method for approximating solutions to equations. We all know that equations have to be solved on occasion

Help, draw a right angle isosceles triangle with 9 triangles in it

draw a right angle isosceles triangle with 9 triangles in it

Explain the dependent events, Explain the Dependent Events? Events are ...

Explain the Dependent Events? Events are called dependent events when the outcome of one event influences the outcome of the second event. P(A and B) = P(A) P(B following A

Shares and dividends, A man invests rs.10400 in 6%shares at rs.104 and rs.1...

A man invests rs.10400 in 6%shares at rs.104 and rs.11440 in 10.4% shares at rs.143.How much income would he get in all?

Time series models, Time Series Models Additive Model Time seri...

Time Series Models Additive Model Time series value = T +S +C +R Whereas S, C and R are expressed in absolute value Additive Model model is best suited where the

What is angle pairs, What is Angle Pairs? Two angles are adjacent angle...

What is Angle Pairs? Two angles are adjacent angles if they have the same vertex and share one side. Vertical angles are a pair of nonadjacent angles formed by two intersecting

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd