Its about math please help

Question

A train ticket has a perimeter of 32 centimeters and a area of 60 square centimeters. What are the dimensions of the ticket?

Answer 1

P= 2L +2W = 32

L +W = 16

L =16-W

A=LW = (16-W)(W) = 60

-W^2 + 16W = 60

W^2 -16W = -60

W^2 -16W +64 = -60+64

(W-8)^2 = 4

W-8 = +/-sqr4 = + or - 2

W = 8+2 or 8-2 = 10 or 6 cm Wide

L = 16-10 or 16-6 = 6 or 10 cm Long

the ticket tdimensions are 6 by 10 cm

6x10 = 60 cm^2 Area

2(10+6)= 32 cm Perimeter