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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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http://prntscr.com/8ipx9a
the zero product property would say that you can set each equal to 0 then solve for x. A you actually have wrong. It should be (x+45)(x-40)=0. this would give you the positive 5x in the equation. (x+45)=0 and (x-40)=0 solve for x for both x=-45 and x=40 C. This means that x could equal -45 and 40, and the equation would be true you can plug the numbers in to check x^2+5x-1800=0 (-45)^2+5(-45)-1800=0 2025-225-1800=0 1800-1800=0 0=0 this is a true statement. 40 should work as well if you plug it in

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wait what do i write for b?
|dw:1442819800060:dw|
http://prntscr.com/8iq0hy is this correct?
you showed it correctly, but used the wrong equation. your answer the A is wrong. My first reply explained why. you should end up with x=-45 and x=40
the equation for the length can be written as l=2w+10, where w is the width.since the width can't be a negative number, it has to be 40. so the length can be found by plugging 40 into w. l=2w+10 l=2(40)+10 l=80+10 l=90
and you know this is correct because the total area of the dog park is 3600. area=lxw you now know the length is 90 and the width is 40 90X40=3600 which is true

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