Question

multiply using the generic rectangle.(x - 7)² what is the sum?

Answer 1

Let' solve the given expression using generic rectangles.

Then, we sum all the expressions inside the boxes.

$\begin{gathered} x^2-7x-7x+49 \\ x^2-14x+49 \end{gathered}$

Therefore, the sum is

$x^2-14x+49$