Solve each problem. See Examples 5 and 9. A cashier has a total of 30 bills, made up of ones, fives, and twenties. The number of twenties is 9 more than the number of ones. The total value of the money is \$351. How many of each denomination of bill are there?
Table of contents
- 0. Review of Algebra4h 18m
- 1. Equations & Inequalities3h 18m
- 2. Graphs of Equations1h 43m
- 3. Functions2h 17m
- 4. Polynomial Functions1h 44m
- 5. Rational Functions1h 23m
- 6. Exponential & Logarithmic Functions2h 28m
- 7. Systems of Equations & Matrices4h 5m
- 8. Conic Sections2h 23m
- 9. Sequences, Series, & Induction1h 22m
- 10. Combinatorics & Probability1h 45m
7. Systems of Equations & Matrices
Introduction to Matrices
Problem 45
Textbook Question
Perform each long division and write the partial fraction decomposition of the remainder term. (x4-x2+2)/(x3-x2)
Verified step by step guidance1
Identify the dividend and divisor for the long division: dividend is \(x^{4} - x^{2} + 2\) and divisor is \(x^{3} - x^{2}\).
Set up the long division by dividing the leading term of the dividend, \(x^{4}\), by the leading term of the divisor, \(x^{3}\), to find the first term of the quotient.
Multiply the entire divisor \(x^{3} - x^{2}\) by the term found in the previous step and subtract this product from the dividend to find the new remainder.
Repeat the division process with the new remainder: divide its leading term by \(x^{3}\), multiply the divisor by this term, and subtract again until the degree of the remainder is less than the degree of the divisor.
Express the original rational expression as the quotient plus the remainder over the original divisor, then write the partial fraction decomposition of the remainder term by factoring the divisor and breaking the fraction into simpler terms.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Polynomial Long Division
Polynomial long division is a method used to divide a polynomial by another polynomial of lower or equal degree. It involves dividing the leading terms, multiplying, subtracting, and bringing down the next term repeatedly until the remainder has a lower degree than the divisor. This process helps simplify complex rational expressions.
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Partial Fraction Decomposition
Partial fraction decomposition breaks a rational expression into a sum of simpler fractions with denominators that are factors of the original denominator. This technique is useful for integration and solving equations. After division, the remainder term is expressed as partial fractions to simplify further operations.
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Decomposition of Functions
Factoring Polynomials
Factoring polynomials involves expressing a polynomial as a product of its factors, which can be linear or quadratic. Recognizing and factoring the denominator is essential for partial fraction decomposition, as it determines the form of the simpler fractions into which the expression is broken down.
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