## Algebra 1

81$w^{2}$-49
In order to simplify the product (3w+7)(3w-7) we must apply the rule that states that (a+b)(a-b)=$a^{2}$-$b^{2}$, and we'll set a=3w and b=7. Therefore, (3w+7)(3w-7)=$(9w)^{2}$-$7^{2}$ =81$w^{2}$-49