The length

The length of a rectangle is 6 meters less than twice the width. If the area of the rectangle is 216 meters, find the rectangle's dimensions.

Correct answer:

a =  18 m
b =  12 m

Step-by-step explanation:

a = 2b 6 S = ab S=216 m2  a(a+6)/2=S  a(a+6)/2=216 0.5a2+3a216=0  p=0.5;q=3;r=216 D=q24pr=3240.5(216)=441 D>0  a1,2=2pq±D=13±441=3±211 a1,2=3±21 a1=18 a2=24  a=a1=18=18 m

Our quadratic equation calculator calculates it.

b=(a+6)/2=(18+6)/2=12 m

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