If x²+2=0 and x²=-4 give rise to complex numbers, what if the constant is an odd number

Mathematics

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Answer

Complex numbers\text{Complex numbers}

Step-by-step solution

4 steps
  1. Consider the general form of the equation x2+C=0x^2 + C = 0.

    This equation can be rearranged to solve for x2x^2:

    x2=−Cx^2 = -C
  2. If the constant CC is a positive odd number (like 1, 3, 5, etc.), let's use C=3C=3 as an example.

    x2=−3x^2 = -3
  3. To find xx, we take the square root of both sides.

    x=±−3x = \pm \sqrt{-3}
  4. We know that −1=i\sqrt{-1} = i (the imaginary unit).

    So, we can rewrite the expression:

    x=±3⋅−1x = \pm \sqrt{3} \cdot \sqrt{-1} x=±3ix = \pm \sqrt{3}i

    These solutions are complex numbers.

    The parity (odd or even) of a positive constant CC in an equation of the form x2+C=0x^2+C=0 does not change the nature of the solutions. As long as CC is positive, −C-C will be negative, and taking the square root of a negative number will always result in complex numbers.

    The solutions will still be complex numbers.
    Complex numbers\text{Complex numbers}

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