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24 February, 20:52

For which of the following values of p will the solutions to the equation 2x^2+p=0 be complex numbers?

a) - 50

b) - 14

c) - 7/2

d) 0

e) 32

+3
Answers (1)
  1. 25 February, 00:43
    0
    The answer is 32.

    Step-by-step explanation:

    Complex numbers are the number that can be written in the form of a + bi, where a is the real part, b is the imaginary part and i is the unit imaginary part which is equal to √-1.

    Solving the given equation:

    2x^x + p = 0

    2x^2/2 + p/2 = 0/2

    x^2 + p/2 = 0

    x^2 + p/2 - p/2 = - p/2

    x^2 = - p/2

    taking √ on both sides

    √x^2 = √ (-p/2)

    x = √ (-1) (p/2)

    as we know that √ (-1) = i

    therefore

    x = √ (p/2) i

    Hence, form the given choices only 32 will gives the complex number as a solution.

    Now putting p = 32, we'll get

    x = √ (32/2) i

    x = 4i is the required solution.
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