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Questions and Answers
What is the solution to the equation $x^2 = -4$?
What is the solution to the equation $x^2 = -4$?
- $x = \pm 2i$ (correct)
- $x = \pm 4i$
- $x = -2i$
- $x = 2i$
What is the discriminant of the quadratic equation $x^2 + 4 = 0$?
What is the discriminant of the quadratic equation $x^2 + 4 = 0$?
- 4
- 0
- -8
- -16 (correct)
What does it mean when it is said that negative numbers don’t have real square roots?
What does it mean when it is said that negative numbers don’t have real square roots?
- They are not closed under addition
- They contradict the associative property of addition
- They result in complex numbers (correct)
- They violate the commutative property of multiplication
Why does the equation $x^2 + 4 = 0$ have no real solution?
Why does the equation $x^2 + 4 = 0$ have no real solution?
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What type of solutions do quadratic equations with a negative discriminant have?
What type of solutions do quadratic equations with a negative discriminant have?
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What is a loop in programming?
What is a loop in programming?
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Which loop type repeats a code block as long as a given condition is true?
Which loop type repeats a code block as long as a given condition is true?
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What does the variable 'i' represent in the code 'int i=0; While(i < 10)'?
What does the variable 'i' represent in the code 'int i=0; While(i < 10)'?
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