...s 50 + 50 + 50 represent the left side of a basic arithmetic operation. It is an addition problem in which the first number is called the augend. The next two numbers are being added to the augend and...

...lear that square of 9 or (9)^2=81 but you can do it in this way to0 9=10-1 so calculate this way (10-1)^2=square of 10 + square of 1 -2 x 10 x 1 so 100 + 1 - 20=81 you can check for others too let ta...