a) The solution set of the equation \(X^2 + 25 = 0\) in \(\mathbb{R}\) is:
(a) \(\{5\}\)
(b) \(\{5, -5\}\)
(c) \(\{-5\}\)
(d) \(\emptyset\)
Correct answer: (d) \(\emptyset\)
MR/Nasef.N
b) The solution set of the equation \((X - 4)^2 = 0\) in \(\mathbb{R}\) is:
(a) \(\{4\}\)
(b) \(\{0, 4\}\)
(c) \(\{0, -4\}\)
(d) \(\{-4\}\)
Correct answer: (a) \(\{4\}\)
MR/Nasef.N
c) The solution set of the equation \(X(X - 3) = 5X\) in \(\mathbb{R}\) is:
(a) \(\{3\}\)
(b) \(\{0, 3, 5\}\)
(c) \(\{3, 5\}\)
(d) \(\{0, 8\}\)
Correct answer: (d) \(\{0, 8\}\)
MR/Nasef.N
d) The solution set of the equation \(\frac{4}{X} = \frac{X}{9}\) in \(\mathbb{R}\) is:
(a) \(\{4, 9\}\)
(b) \(\{6, -6\}\)
(c) \(\{6\}\)
(d) \(\{36\}\)
Correct answer: (b) \(\{6, -6\}\)
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