Question

0;y= x^{2} -9" align="absmiddle" class="latex-formula">$y=x^{2} -9$

Answer 1

Simple...

y=$x^{2} -9$

$y= x^{2} -9$

It's quite easy to see $x^{2} = x^{2}$

Thus, any value of x makes the equation true.

Thus, your answer.