(a-6)2 +4(a-6)+4/a-4 при a = 0,18

2a-12+4a-24+4/a-4

0.36-12+0.72-24+4/9/50-4

0.36-12+0.72-24+200/9-4

-38.92+200/9

-937/25+200/9

-3757/225

-16 157/225 или -16.697