∵f(x)=x6-5x5+6x4+x2+0.3x+2=(((((x-5)x+6)x+0)x+2)x+0.3)x+2,∴v0=a6=1,v1=v0x+a5=1×(-2)-5=-7,v2=v1x+a4=-7×(-2)+6=20,故答案为:20.