Question

Please make x the subject of the formula

Answer 1

Answer:

Step-by-step explanation:

$y = \frac{x^{2} +4}{x^{2} -7}$

$y (x^{2} -7)=x^{2} +4$

$yx^{2} -7y =x^{2} +4$

$yx^{2} -x^{2} = 4+7y$

$x^{2} = \frac{4+7y}{y-1}$