Evaluate 72^2 − 30^2 using an arithmetic identity.
Note
Use a²−b²=(a−b)(a+b). Here (72−30)(72+30) = 4284.
Evaluate 72^2 − 30^2 using an arithmetic identity.
Use a²−b²=(a−b)(a+b). Here (72−30)(72+30) = 4284.