SOLUTION: The area of a rectangle is 100ft^2. Use x as the width and x+2 as the length. What are the dimensions of the rectangle.

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Question 246835: The area of a rectangle is 100ft^2. Use x as the width and x+2 as the length. What are the dimensions of the rectangle.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
x(x+2)=100
x^2+2x-100=0
x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+
x=(-2+-sqrt[2^2-4*1*-100])/2*1
x=(-2+-sqrt[4+400])/2
x=(-2+-sqrt404)/2
x=(-2+-20.1)/2
x=(-2+20.1)/2
x=18.1/2
x=9.05 ans for the width
9.05+2=11.05 ans. for the length.
Proof:
9.05*11.05=100
100~100