Question 129641
ORIGINAL RECTANGLE=X(X+5)=X^2+5X
EXPANDED RECTANGLE=(X+3)(X+8)=X^2+11X+24 HERE YOU HAVE TO INCREASE BOTH THE LENGTH & THE WIDTH.
X^2+5X=X^2+11X+24-60
5X=11X-36
5X-11X=-36
-6X=-36
X=-36/-6
X=6 THE ORIGINAL WIDTH.
6+5=11 THE ORIGINAL LENGTH.
PROOF:
6*11=(6+3)(6+8)-60
66=9*14-60
66=126-60
66=66