In Exercises 1–4, make the given changes in the indicated examples of this section, and then solve the resulting problems.
In Example 10(b), change 5[a – (2a2b – a)] + 2b} to {a – [2a2b – (a + 2b)]}.
EXAMPLE 10 Several symbols of grouping
(b)
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EBK BASIC TECHNICAL MATHEMATICS WITH CA
- 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_forwardPage 102 #1 1. What is the value of 4(x- 2)(x-3)+7(x- 2)(x- 5)-6(x- 3)(x- 5) when x = 5? Show your work or explain your reasoning. Submitarrow_forwardWhat is (1 + i)³?arrow_forward
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