√1.5 × √ =√1 × √ 0.72 =√7 × √66

Question

√1.5 × √ =
√1 × √ 0.72 =
√7 × √66

Answer 1

1.ЧЧисло не пропустил(а)?
2.√1*0/72=√72
3.√7*66=√462