happy4you
happy4you happy4you
  • 10-04-2017
  • Mathematics
contestada

the area of the rectangle 56cm. the length is 2cm more than x and the with is 5cm less than twice x. solve for x. round the nearest whole number.

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irspow
irspow irspow
  • 10-04-2017
(x+2)(2x-5)=56

2x^2-5x+4x-10=56

2x^2-x-10=56

2x^2-x-66=0

2x^2-12x+11x-66=0

2x(x-6)+11(x-6)=0

(2x+11)(x-6)=0, since x is a measurement x>0 so:

x=6cm


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InstaGenius
InstaGenius InstaGenius
  • 10-04-2017
X will equal 6 centimeters
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