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a rectangular playground covers 4500m^2 its length is 40m longer than its width. what is the width of the playground?
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Feb 2, 2018
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a rectangular playground covers 4500m^2 its length is 40m longer than its width. what is the width of the playground?
Mathematics
high-school
Zeinab Abbasimazar
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Zeinab Abbasimazar
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LW=area=4500
L=40+W
(40+W)(W)=4500
W²+40W=4500
W²+40-4500=0
factor
(W-50)(W+90)=0
set to zero
W-50=0
W=50
W+90=0
W=-90
false, can't have negative measures
W=50
L=40+W
L=40+50=90
the width is 50 m
Kyle Greenlaw
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Feb 8, 2018
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Kyle Greenlaw
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