The square of a number is positive
N ca be positive or negative, so test both scenarios:
Take a positive number n.
n^2 = n^2 * n^2 or Positive * Positive which is positive
Take a negative number n
(-n)^2 = -n * -n or Negative * Negative which is positive
(-n)^2 = n^2
N ca be positive or negative, so test both scenarios:
Take a positive number n.
n^2 = n^2 * n^2 or Positive * Positive which is positive
Take a negative number n
(-n)^2 = -n * -n or Negative * Negative which is positive
(-n)^2 = n^2