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

Complex roots - second order differential equations, We will be looking at ...

We will be looking at solutions to the differential equation, in this section ay′′ + by′ + cy = 0 Wherein roots of the characteristic equation, ar 2 + br + c = 0 Those

.fractions, what is the difference between North America''s part of the tot...

what is the difference between North America''s part of the total population and Africa''s part

Calculus, need someone to log into my hawkes and complete homework due

need someone to log into my hawkes and complete homework due

What are logarithmic function, The logarithm of a provided number b to the ...

The logarithm of a provided number b to the base 'a' is the exponent showing the power to which the base 'a' have to be raised to get the number b. This number is defined as log a

Real exponents, It is a fairly short section.  It's real purpose is to ackn...

It is a fairly short section.  It's real purpose is to acknowledge that the exponent properties work for any exponent.  We've already used them on integer and rational exponents al

QM II, A HOSPITAL CURRENTLY ORDERS SALINE AT THE BEGINNING OF EACH MONTH. T...

A HOSPITAL CURRENTLY ORDERS SALINE AT THE BEGINNING OF EACH MONTH. THIS MONTH, THEY HAD 178 BAGS OF SALINE IN STOCK AND ORDERED 1,277 BAGS. DEMAND FOR SALINE IS NORMALLY DISTRIBUTE

Derivatives with chain rule, Chain Rule : We've seen many derivatives...

Chain Rule : We've seen many derivatives.  However, they have all been functions similar to the following kinds of functions. R ( z ) = √z      f (t ) = t 50

How to multiplying rational expressions, how to Multiplying Rational Expres...

how to Multiplying Rational Expressions ? To multiply fractions, or rational expressions, you must multiply the numerators and then multiply the denominators. Here's how it is

Terminology of polynomial, Terminology of polynomial Next we need to ge...

Terminology of polynomial Next we need to get some terminology out of the way. Monomial polynomial A monomial is a polynomial which consists of exactly one term.

Find the probability , 1.  What is the probability that the two beverages w...

1.  What is the probability that the two beverages will be of the same kind? 2.  What is the probability that the two beverages will be different? 3.  What is the probability

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