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In Exercises 55–62, factor the given expressions by grouping as Illustrated in Example 10.
4p2 – q2 + 2p + q
EXAMPLE 10 Factoring by grouping
Factor: 2x – 2y + ax – ay.
We see that there is no common factor to all four terms, but that each of the first two terms contains a factor of 2, and each of the third and fourth terms contains a factor of a. Grouping terms this way and then factoring each group, we have
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Chapter 6 Solutions
Student Solutions Manual For Basic Technical Mathematics And Basic Technical Mathematics With Calculus
- Scientific Notation. In Exercises 9–12, the given expressions are designed to yield results expressed in a form of scientific notation. For example, the calculator-displayed result of 1.23E5 can be expressed as 123,000, and the result of 1.23E-4 can be expressed as 0.000123. Perform the indicated operation and express the result as an ordinary number that is not in scientific notation. 614arrow_forwardExercises 143–145 will help you prepare for the material covered in the next section. In each exercise, factor completely. 143. 2r + 8x? + 8x 144. 5x3 – 40x?y + 35xy2 145. 96?x + 9b²y – 16x – 16y -arrow_forwardDetermine whether each expression in Exercises 24–27 isa polynomial. If it is, state the degree of the polynomial.arrow_forward
- For 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_forwardIn Exercises 30–33, factor the greatest common factor from each polynomial. 30. 16x3 + 24x² 31. 2x 36x2 32. 21x?y – 14xy² + 7xy 33. 18r'y? – 27x²yarrow_forwardUse the laws of exponents to simplify the expressions in Exercises 11–16arrow_forward
- Simplify the expressions in Exercises 65–68.arrow_forwardFor Exercises 11–12, a. Rationalize the numerator of the expression and simplify. b. Substitute 0 for h in the simplified expression. Vx + h + 1 – (Vĩ + 1) 11. V2x + h) – V2x - 12. h harrow_forwardIn Exercises 101–103, perform the indicated operations. 1 1 1 101. x" – 1 x" + 1 x2" – 1 (1-X- -X ) (1 – (1 – 102. (1 - x + 1) x + 2 x + 3 103. (x – y)-1 + (x – y)-2arrow_forward
- In Exercises 83–92, factor by introducing an appropriate substitution. 83. 2r* – x? – 3 84. 5x4 + 2x2 3 85. 2r6 + 11x³ + 15 86. 2x + 13x3 + 15 87. 2y10 + 7y + 3 88. 5y10 + 29y – 42 89. 5(x + 1)2 + 12(x + 1) + 7 (Let u = x + 1.) 90. 3(x + 1) - 5(x + 1) + 2 (Let u = x + 1.) 91. 2(x – 3) – 5(x – 3) – 7 92. 3(x – 2) – 5(x – 2) – 2arrow_forwardFor Exercises 8–10, a. Simplify the expression. Do not rationalize the denominator. b. Find the values of x for which the expression equals zero. c. Find the values of x for which the denominator is zero. 4x(4x – 5) – 2x² (4) 8. -6x(6x + 1) – (–3x²)(6) (6x + 1)2 9. (4x – 5)? - 10. V4 – x² - -() 2)arrow_forwardIn Exercises 133–136, factor each polynomial completely. Assume that any variable exponents represent whole numbers. 133. y + x + x + y 134. 36x2" – y2n 135. x* 3n 12n 136. 4x2" + 20x"y" + 25y2marrow_forward
- Algebra: Structure And Method, Book 1AlgebraISBN:9780395977224Author:Richard G. Brown, Mary P. Dolciani, Robert H. Sorgenfrey, William L. ColePublisher:McDougal LittellAlgebra & Trigonometry with Analytic GeometryAlgebraISBN:9781133382119Author:SwokowskiPublisher:Cengage
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