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Divide and if there is a remainder, express it in two ways. Use synthetic division in Exercises 28–30. [5.3b, c]
Janine found that the sum of two rational expressions was
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Intermediate Algebra (13th Edition)
- 3. Determine the equation of the polynomial function that has roots of x = 1 + 2i and x = and passing through the point (1, 72). Leave 1 — 2 your final answer in factored form.arrow_forwardExercises 38–40 will help you prepare for the material covered in the first section of the next chapter. In Exercises 38-39, simplify each algebraic expression. 38. (-9x³ + 7x? - 5x + 3) + (13x + 2r? – &x – 6) 39. (7x3 – 8x? + 9x – 6) – (2x – 6x? – 3x + 9) 40. The figures show the graphs of two functions. y y 201 10- .... -20- flx) = x³ glx) = -0.3x + 4x + 2arrow_forwardIn Exercises 20–21, solve each rational equation. 11 20. x + 4 + 2 x2 – 16 - x + 1 21. x? + 2x – 3 1 1 x + 3 x - 1 ||arrow_forward
- For Exercises 69–84, find the zeros and their multiplicities. Consider using Descartes' rule of signs and the upper and lower bound theorem to limit your search for rational zeros. (See Example 10) 69. f(x) = 8x – 42x + 33x + 28 (Hint: See Exercise 61.) 6x – x? (Hint: See Exercise 62.) 70. f(x) - 57x + 70 72. f(x) = 3x – 16x + 5x + 90x (Hint: See Exercise 64.) 2x + 11x - 63x? - 50x + 40 71. f(x) = (Hint: See Exercise 63.) - 138x + 36arrow_forwardFor questions 10 – 11, use the table to answer the questions. It is set up to multiply two polynomials. (show your work)arrow_forward3.) Simplify (0.75x + 2y) - (0.3x – 0.6y)arrow_forward
- Determine the simplified form of (4 – 37) (–9 + j) – (8 – j5).arrow_forwardFor Exercises 115–120, factor the expressions over the set of complex numbers. For assistance, consider these examples. • In Section R.3 we saw that some expressions factor over the set of integers. For example: x - 4 = (x + 2)(x – 2). • Some expressions factor over the set of irrational numbers. For example: - 5 = (x + V5)(x – V5). To factor an expression such as x + 4, we need to factor over the set of complex numbers. For example, verify that x + 4 = (x + 2i)(x – 2i). 115. а. х - 9 116. а. х? - 100 117. а. х - 64 b. x + 9 b. + 100 b. x + 64 118. а. х — 25 119. а. х— 3 120. а. х — 11 b. x + 25 b. x + 3 b. x + 11arrow_forward. 3x + 1 = x² + 7x – 1arrow_forward
- In Exercises 26–31, find an nth-degree polynomial function with real coefficients satisfying the given conditions. If you are using a graphing utility, use it to graph the function and verify the real zeros and the given function value. 26. n= 3; 4 and 2i are zeros; f(-1) = -50 31. n= 4; -2, 5, and 3 + 2i are zeros; f(1) = -96arrow_forwardIn Problems 5–12, tell whether the given rational expression is proper or improper. If improper, rewrite it as the sum of a polynomialand a proper rational expression.arrow_forwardIn Exercises 9–16, a. List all possible rational zeros. b. Use synthetic division to test the possible rational zeros and find an actual zero. c. Use the quotient from part (b) to find the remaining zeros of the polynomial function. 9. f(x) = x + x² - 4x – 4 10. f(x) = x - 2x² – 11x + 12 11. f(x) = 2x - 3x? - 11x + 6 12. f(x) = 2r - 5x² + x + 2 13. f(x) = x + 4x² 14. f(x) = 2r + x² - 3x + 1 3x - 6 – 15. f(x) = 2r3 + 6x2 + 5x + 2 16. flx) = x - 4x² + &r – 5arrow_forward
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