SOLUTION: Can someone please help me solve these two problems. I am so stumped!! 1.(6x-9y)(6x+9y) I should be using FOIL right? But the same numbers have me stumped!! 2.The area of the

Question 619144: Can someone please help me solve these two problems. I am so stumped!!
1.(6x-9y)(6x+9y) I should be using FOIL right? But the same numbers have me stumped!!
2.The area of the rectangular swimming pool is given by 4x^2+19x+12 ft^2 one side is given by 4x+3 feet. What is an algebraic expression for the other side of length of pool? Simplify this and include correct units.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!
1. Don't need FOIL. Realize that this is a difference of two squares:

2. Area = Length*width, so width = Area/length. Divide:

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