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Which of the following cannot be solved using the quadratic formula?


B. 0=x^2

C. 0=2x^2-1

D. x^2+3x-2=4x^2-5x-1

Is it C?

  • Algebra -

    I would say it is A

    it simplifies to -x + 3 = 0 , which is linear and not quadratic.
    If you force the issue and make it look like a quadratic, it would be
    0x^2 - x + 3 = 0
    so a=0 , b=-1 and c = 0
    BUT, in the formula we are dividing by 2a which in this case would be dividing by zero,
    an operation which is slightly frowned upon in mathematics.

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