We have to find the value of -72
The squares of negative numbers give a positive value, because if we multiply two negative numbers then it will result in a positive number.
Remember that: (-) x (-) = (+)
Therefore, square of (-n), (-n)2 = (-n) x (-n) = n2
Where n is a number.
The value of -72
(-7)2 = (-7) x (-7) = 49
The value of -72 = 49