Question

The length of a rectangle is 3 m longer than its width. the area of the rectangle is 154m2. what is the width

Answer 1

lets assume the length=y and the width=x
y=x+3

A=xy
A=x(x+3)
A=x^2+3x
154=x^2+3x
0=x^2+3x-154

use the quadratic formula

x=11
x=-14 DNE

therefore the width is 11

Answer 2

The width would be 51m