Question 94499
9*6=54 ... (9+x)(6+x)=54+100 ... 54+9x+6x+x^2=154 ... x^2+15x-100=0


factoring gives (x+20)(x-5)-0 ... x+20=0 ... x=-20 ... x-5=0 ... x=5


new dimensions are 6+5=11 and 9+5=14