Question 615293
let original length be x
increased by 5
length = x+5

Are = S^2

(x+5)^2= 144
x^2+10x+25=144
x^2+10x-119=0
x^2+17x-7x-119=0
x(x+17)-7(x+17)=0
(x+17)(x-7)=0
x= 7 OR -17

Ignore negative value
x= 7 the original length