SOLUTION: If the tens and the units digit of a two digit number are both equal to x,then the square of the number is .....
a.110x
b. {{{ 9x^2 }}}
c. {{{ 121x^2 }}}
d.{{{ 4x^2 }}}
The number is 10x + x or 11x
The square of 11x is 121x2
[This is another illustration of a fact that has been
proved. If ever you have no idea which answer is
correct on a multiple choice examination, the most
likely choice is c. lol]
Edwin