The area of the figure below is $\left(y+3\right)\left(y+7\right)$(y+3)(y+7). We want to find another expression for this area by finding the sum of the areas of the four smaller rectangles.
What is the area of rectangle $A$A?
What is the area of rectangle $B$B?
What is the area of rectangle $C$C?
What is the area of rectangle $D$D?
Using the areas of each rectangle, write an equivalent expression for the area of the figure.
Fill in the blanks to make the expression true.
Expand and simplify the following:
$-\left(x+5\right)\left(x+2\right)$−(x+5)(x+2)
Expand the following perfect square: $9\left(3x+8y\right)^2$9(3x+8y)2