Question

What is the square of 15? Justify the answer please.

Answer 1

\[15 ^2 = 15*15\]

Answer 2

In general square of any number a
\[a^2 = a*a\]

Answer 3

Even the square of 5 x 11? 55 x 55

Answer 4

This site might be useful to you in understanding squares (and their opposites - square roots): http://www.mathsisfun.com/square-root.html

Answer 5

@michu
\[(5*11)^2= (5*11)(5*11)\]

Answer 6

so basically you are right @michu