Resposta:
Explicação passo a passo:
(2/3-3ab)²=
(2/3-3ab).(2/3-3ab)=
4/9-9ab-9ab+9a²b²=
4/9-18ab+9a²b²
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Resposta:
Explicação passo a passo:
(2/3-3ab)²=
(2/3-3ab).(2/3-3ab)=
4/9-9ab-9ab+9a²b²=
4/9-18ab+9a²b²