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consider the rectangle below. It's area is 5a^2+21ab+4b^2 and it's length is 2a+8b. find it's width w, in terms of a and b, by dividing it's area by it's length.

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Other answers:

I'm just not sure how to work this.
or how to go about starting it?
Use the idea that Area = Length * Width or A = LW Solve for W W = A/L
Then make the proper substitutions. Then divide and simplify.
@jim_thompson5910 this is what i get when i do that. 2ab^2+5a^2+21ab+8b
That is diving the Area by the length
simplify (5a^2+21ab+4b^2)/(2a+8b)
5a+b/2 ?
would that make my width?
Can you factor 5a^2+21ab+4b^2 at all?
yes into (a+4b)(5a+1b) right?
but u still get the same answer right 5a+b/2 right?
It's right.
Did you mean \[\Large \frac{5a+b}{2}\] ?
then yes, you are correct
I should get a learners metal on that one :0
Thanks !!

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