Problema Solution
The length of a rectangle is 5 cm more than 4 times its width. If the are of the rectangle is 60cm^2, find the dimensions of the rectangle to the nearest thousandth.
Answer provided by our tutors
let length = x
width=y
xy=60
x=4y+5
=> 4y^2 + 5y - 60 =0
=> y = [-5 + sqt(25+960)]/8
=> y = 3.298
=> y = [-5-sqt(25+960)]/8
=> y = -4.548(not possible)
=> y = 3.298
=> x=18.193