A=((8.9+8.9)/2) * 5.4 = 48.06P= 8.9*2 +6*2 = 28.4
We have
.
First let us factor the 2 to obtain,

We can now see clearly that the expression inside the parentheses is a difference of two squares.
We now write the 4 as 2². So that we obtain the expression,

Recall that

Hence our expression becomes,

Therefore, when factored completely,

HOPE YOU CAN READ THE EXCEL FILE
-9 x 1/3
= -9/3
= -3
......................................