posted by Jessica on .
The length of a rectangle is 2 cm more that 5 times it's width. If the area of the rectangle is 84 cm^2 find the dimensions of the rectangle to the nearest thousandth.
This is what I have..is it rihgt?
-5+-the square root of 5^2-4(5)(-82)/2(5)
-5+- the square root of 25+1640/10
-5+- the square root of 1665/10
I don't know how you got your equation.
let the width be x
then the length is 5x+2 and
5x^2 + 2x - 84 = 0
now solve that.
(Igot x=3.9 and a negative x value)