Question 58875
{{{x^2+24=(x+1)^2-25)}}}
{{{x^2+24=x^2+2x+1-25)}}}
{{{24=2x-24)}}}
{{{48=2x)}}}
x=24
So the original shape had 24*24+24=600 and the enlarged shape had 25*25-25=600 characters as well