12 feet multiplied by 10 feet = 120 feet (This is the entire room size) Then you take your $600 and divide it by your entire room size (120) This will give you the amount per square foot. Your answer will be $5.00 per square foot
If by 4x(2) you mean 4x to the power 2 or 4x^2...it can be solved in the following way f(x)=4x^2-4x-3 =4x^2+2x-6x-3 =2x(2x+2)-3(2x+2) =(2x-3)(2x+2) Therefore x=3/2 or x=-2/2=(-1)
