Solve the Formula $$\frac { x ^ { 2 } } { d ^ { 2 } } + \frac { y ^ { 2 } } { n ^ { 2 } } = 1 ; y$$

Multiple Choice

Solve the formula $$\frac { x ^ { 2 } } { d ^ { 2 } } + \frac { y ^ { 2 } } { n ^ { 2 } } = 1 ; y$$
for the indicated variable.

A) $\quad y = \sqrt { n ( 2 - x d ) ( 1 + x d ) } , y = - \sqrt { n ( 2 - x d ) ( 1 + x d ) }$
B) $\quad y = \sqrt { n ( 1 - x d ) ( 1 + x d ) } , y = - \sqrt { n \left( 1 - x d ^ { d } \right) ( 1 + x d ) }$
C) $y = n \sqrt { \left( 1 - \frac { x } { d } \right) \left( 1 + \frac { x } { d } \right) } , y = - n \sqrt { \left( 1 - \frac { x } { d } \right) \left( 1 + \frac { x } { d } \right) }$
D) $y=\sqrt{n\left(1-\frac{x}{d}\right) ^{2}}, y=-\sqrt{n\left(1-\frac{x}{d}\right) ^{2}}$ e.

E) $y=n \sqrt{\left(\mathrm{a}-\frac{x}{d}\right) \left(\mathrm{a}+\frac{x}{d}\right) }, y=-n \sqrt{\left(\mathrm{a}-\frac{x}{d}\right) \left(\mathrm{a}+\frac{x}{d}\right) }$