Prove that the equation of the parabola whose vertex and focus are on the \( X \)-axis at a dist... VIDEO
Prove that the equation of the parabola whose vertex and focus are on the \( X \)-axis at a distance \( a \) and \( a^{\prime} \) from the origin respectively is \( y^{2}=4\left(a^{\prime}-a\right)(x-a) \).
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