Question 663127
15*30=4500 CM^2 ORIGINAL SIZE.
(15+X)(30+X)=450+144
4500+45X+X^2=594
X^2+45X+450-594=0
X^2+45X-144=0
(X-3)(X+48)=0
X-3=0
X=3 ANS.
PROOF:
(15+3)(30+3)=594
18*33=594
594=594