Question 314425
19*24=456 IN^2 IS THE AREA OF THE PICTURE.
(19+2X)(24+2X)=456+188
456+48X+38X+4X^2=644
4X^2+86X+456-644=0
4X^2+86X-188=0
(2X-4)(2X+47)=0
2X-4=0
2X=4
X=4/2
X=2 ANS. FOR THE BORDER WIDTH.
PROOF:
(19+2*2)(24+2*2)=456+188
(19+4)(24+4)=644
23*28=644
644=644