math shortcut i found

13x13=169 13+13-26-1=25+2=27
169+27=196= 14x14.
14+14=28+2=30. 196+30=226 15x15=225 UH OH

12x12=144 12+12=24+1=25
144+25=169=13x13
13+13=26+1=27
169+27=196=14x14
14+14=28+1=29
196+29=225=15x15
I FOUND A GREAT SHORTCUT FOR SQUARING NUMBERS!
( written at home from school with the throwups)
Post Scriptum: I threw up a minute after writing this