Question

One solution of x^2-25=0 is 5 what is the other solution

Answer 1

Add 25 to both sides:

$x^2 = 25$

Square root both sides.

When you square root a perfect square, you will get a plus/minus result:

$\sqrt{25} = \pm 5$

$x = \pm 5$

$\boxed{x = -5} \land \boxed{x = 5}$

The other solution to this answer is x = -5.