SAT Math Practice Question
$$y=x^{2}-a$$In the equation above, $a$ is a positive constant and the graph of the equation in the $x y$-plane is a parabola. Which of the following is an equivalent form of the equation?
- A.$y=(x+a)(x-a)$
- B.$y=(x+\sqrt{a})(x-\sqrt{a})$
- C.$y=\left(x+\frac{a}{2}\right)\left(x-\frac{a}{2}\right)$
- D.$y=(x+a)^{2}$ DIRECTIONS
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