You have illustrated the expansion using FOIL Method very clearly. Good! To explain using the area of rectangle, we would treat the length of the rectangle as x. So, when we subtract the length by 9, the remaining side would be x-9. From there, you should be able to work out the areas of the different parts correctly.

Christabel

ReplyDeleteYou have illustrated the expansion using FOIL Method very clearly. Good!

To explain using the area of rectangle, we would treat the length of the rectangle as x. So, when we subtract the length by 9, the remaining side would be x-9. From there, you should be able to work out the areas of the different parts correctly.