Asked by SkatingDJ

1. A rectangular wooden frame has side lengths 5x and 7x + 1. The rectangular opening for a picture has side lengths 3x and 5x.
-What is the area of the wooden part of the frame? Write your answer in factored form.
-How can drawing a diagram help you solve the problem?
-How can you express the area of the wooden part of the frame as a difference of areas?

2. Describe and correct the error made in multiplying.

I need help with the first one, I know it a little bit but any guidance would be great. But I have no clue what the second one is asking:( Thx!
Answered by SkatingDJ
For the first one, this is the equation i got:

5x * 7x (+1) - 3x * 5x

is this correct?
Answered by SkatingDJ
is 20x^2 correct?

How do i say the other parts?
And i still have no clue was #2 is trying to ask:(
Answered by Steve
(5x)(7x+1)-(3x)(5x) = (7x+1-3x)(5x) = (4x+1)(5x)
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