Question

the length of a rectangle is one more than two times the width. The area of a rectangle is 136. find the dimensions

Answer 1

I'm not sure how to work this out but I can tell you the formula.
Formula - 2w + 1. 

Answer 2

let width be x
ie length = 2x+1
area = (2x+1)(x)
2x^2+x=136
2x^2+x-136=0
(x-8)(2x+17)=0
x-8=0 or 2x+17=0
x=8 or x = -17/2 (reject as length>0)
x = 8
width is 8
length is 17


u can check this by multiplying 17 and 8 and it gives u 136 ie this is correct