A family is having a pool built in their backyard. If their yard in rectangular and measures 10x by 5x and the pool is circular with a radius of 2x how much of the yard will be left over after the pool is built? Write your answer in factored form.

Answer 1

I assume you know the formulas for area of rectangle and circle.
Now just subtract the circle from the rectangle. Since both expressions are for area, there should be some x^2 in each term that you can factor out.