Jawabanmu

2014-09-13T11:31:30+07:00
A.K=2(5x-2)+2(x+8)=10x-4+2x+16=12x+12   L=(5x-2)(x+8)=5x^2+38x-16
b. L=(5.3-2)(3+8)=13.11=143 m^2    K=12.3+12=36+12=48 m