trex1369 trex1369

08-12-2017
Mathematics

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The length of a rectangle is 1 more than twice its width. The rectangle has an area of 210 m². Let w represent the width of the rectangle. What expression represents the length?

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jorel1380 jorel1380

08-12-2017

w=rectangle width
2w+1=rectangle length
w(2w+1)=210
2w²+w-210=0
(2w+21 )(w-10)=0
w=-21/2 or 10
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