Please help 33-40, thanks!
1 answer:
33. -8 belongs to:
- Set of real numbers; all rational and irrational numbers
- Set of integers; positive and negative whole numbers
34. 14 belongs to:
- Set of natural numbers; all positive whole numbers
- Set of real numbers; all rational and irrational numbers
35. 9.23 belongs to:
- Set of real numbers; all rational and irrational numbers
36. belongs to:
- Set of real numbers; all rational and irrational numbers
37. Zero (0) belongs to:
- Set of Integers; all positive and negative whole numbers
- Set of real numbers; all rational and irrational numbers
38. -1 belongs to:
- Set of integers; all positive and negative whole numbers
- Set of real numbers; all rational and irrational numbers
39. 1/2 belongs to:
- Set of real numbers; all rational and irrational numbers
40. 0.3 where 3 is recurring belongs to:
- Set of real numbers; all rational and irrational numbers
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Answer:
see explanation
Step-by-step explanation:
Note that (x² + 5)(x² - 5) are the factors of a difference of squares
a² - b² = (a + b)(a - b)
with a = x² and b = 5, hence
(x² + 5)(x² - 5) = (x²)² - 5² = - 25, thus
3( - 25) = 3
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