Question 139938
when i subtract 25 from the number then square it the answer 
i get is the same as
when i square the number the subtract 25 from the answer 


Let x = the number

{{{(x-25)^2=x^2 -25}}}
{{{x^2 - 50x + 635 = x^2 -25 }}}


Subtract {{{x^2}}} from each side:
{{{-50x + 625 = -25}}}
{{{-50x + 625 -625 = -25-625}}}
{{{-50x = -650}}}
{{{x=13}}}


Check: 
when i subtract 25 from the number then square it the answer 
i get is the same as
when i square the number the subtract 25 from the answer 

13-25 = -12.  Square it to get 144.
13^2 = 169.  Subtract 25 to get 144.


R^2