Solve for $x$x:
$x^2-25=0$x2−25=0
Write all solutions on the same line, separated by commas.
Solve for $x$x, expressing your answer in exact surd form.
$x^2=98$x2=98
Solve $ax^2-c=0$ax2−c=0 for $x$x.
Assume $a$a and $c$c are positive.
How many real solutions does the following equation have?