交換 こうかん法則 ほうそくじゃありませんでした
kōkanhōsokujārimasendeshita

Noun
Desu Copula

The polite, past negative form of 交換法則

1. Was not the commutative law.; It wasn't the commutative law.

Past/Perfective
Negative
Polite
Terminal Form
Mathematics