Area=legnth times width (3x+5)(2x+8)=360 first expand
6x²+34x+40=360 minus 360 both sides 6x²+34x-320=0 factor out 2 2(3x²+17x-160)=0 factor inner by trial and error (2)(x-5)(3x+32)=0 set to zero x-5=0 x=5
3x+32=0 3x=-32 x=-32/3 false, a dimention can't be negative