Problem to solve:
The sum of two terms multiplied by their difference is equal to the square of the first term minus the square of the second term. In other words: $(a+b)(a-b)=a^2-b^2$, where:
- The first term ($a$) is $a$.
- The second term ($b$) is $3b$.
The power of a product is equal to the product of it's factors raised to the same power