## Algebra 1: Common Core (15th Edition)

First, you have to substitute in 5 for d, so the new equation is: $(2+5)^{2}$ - $3^{2}$. Now, you will add the part in the parentheses to get $7^{2}$. Now just expand this out and solve: 7 x 7 - 3 x 3=49-9=40. 40 is your answer.