BuyFind

Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071
BuyFind

Precalculus: Mathematics for Calcu...

6th Edition
Stewart + 5 others
Publisher: Cengage Learning
ISBN: 9780840068071

Solutions

Chapter 1.4, Problem 40E
To determine

To calculate:Thesimplified form of the expression 2x1x+41

Expert Solution

Answer to Problem 40E

The simplified form of the expression is x5x+4_

Explanation of Solution

Given information:

The expression is 2x1x+41

Formula used:

To add or subtract rational expression, first find the common denominator and then use the following property of fractions:

  PR+QR=P+QR

If the denominators are not same then find least common denominator. The least common denominator is found factoring each denominator and taking the product of distinct factors, using the highest power that appears in any of the factors.

Calculation:

Consider the provided expression. 2x1x+41

Recall that,

To add or subtract rational expression, first find the common denominator and then use the following property of fractions:

  PR+QR=P+QR

If denominators are not same then find least common denominator. The least common denominator is found factoring each denominator and taking the product of distinct factors, using the highest power that appears in any of the factors.

Rewrite the given expression as:

  2x1x+411

Since denominators are not the same then find the least common denominator.

The least common denominator of 1 and (x+4) is (x+4)

  2x1x+411=(2x1)×1(x+4)×11×(x+4)1×(x+4)

Add fractions,

  2x1x+411=1×(2x1)1×(x+4)(x+4)=2x1x4(x+4)

Combine terms in numerator,

  2x1x+411=x5x+4

Thus, the simplified form of the expression is x5x+4

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