What are the dimensions of a rectangle when the area is 154 sq inch and the length is 3 x more than the width

Question

If a rectangle is 3 more than its width and the area of the rectangle is 154 sq inches, than what are the dimensions of the rectangle 

Answer 1

A=l*w

w=width

w+3=length

w*(w+3)=154

w²+3w-154=0

154=2*7*11=(2*7)*(11)=14*11 and 14-11=3

factor

(w+14)(w-11)=0

w-11=0

w=11 in

l=11+3=14 in