Multiple Choice Question (MCQ)

If 2y^2+x-4 = 0 , and \dfrac{x}{2}=y^2 , then x =

  1. ×

    1

  2. 2

  3. ×

    3

  4. ×

    4

  5. ×

    5

Collected in the board: Algebraic equation

Steven Zheng posted 3 months ago


Answer

  1. Take y^2 as one variable

    Since \dfrac{x}{2}=y^2 , that is,

    y^2 = \dfrac{x}{2}

    Plug in the equation

    2y^2+x-4=0

    then,

    2\cdotp \dfrac{x}{2}+x=4

    2x = 4

    \therefore x = 2

    B is the choice.

Steven Zheng posted 1 month ago

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