Question 195023
Good  Job,,, with  just  very  minor  mods
.
in  line  " -3 +25+4"  should  be  "-13 +25 +4",,,,,,just  a  typo,,,next  line  is  correct
.
form  is  correct,,  except  16  is  r^2,,,therefore  r=4
.
Keep  up  good  work