Question 222452
"The lenght of a retangle is 3 cm longer than twice the width" --> L=2W+3


A=LW=(2W+3)(W)=90


2W^2+3W=90


2W^2+3W-90=0


(W-6)(2W+15)=0


W=6 or W=-15/2 ---> L=2(6)+3=15


Answer: width = 6, length = 15