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Find all real solutions of the equation by first rewriting the equation as a quadratic equation. (Enter your answers as a comma-separated list.)

4x4 + 15x2 − 4 = 0

  • MATH - ,

    Let y=x²
    the equation can then be written as
    Solve for y using the quadratic formula (i.e. find y1 and y2).
    Since y=x², then
    x=±√(y1) or ±√(y2)
    giving a total of 4 solutions.

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