SOLUTION: hello please help me on this question i dont understand how to figure it out. the total area of a rectangle is 4x-9y ( please note there is a little four ontop of the x but sence

Question 146198: hello please help me on this question i dont understand how to figure it out.
the total area of a rectangle is 4x-9y ( please note there is a little four ontop of the x but sence i do not know how to type that on the computer im sorry)which factors could represent the length times width? THANK YOU
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
I'm assuming that the expression for the area is

Start with the given expression

Rewrite as

Rewrite as

Now use the difference of squares to factor the expression. Remember, the difference of squares formula is where in this case and

Plug in and

So the expression

factors to

Notice that if you foil the factored expression, you get the original expression. This verifies our answer.

So this means that the width is and the length is (or vice versa since the order does not matter).
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