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Tohaina

a^{2}+ab-3ba-3b^{2}
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o a-3b ki ia tau o a+b.
a^{2}-2ab-3b^{2}
Pahekotia te ab me -3ba, ka -2ab.
a^{2}+ab-3ba-3b^{2}
Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o a-3b ki ia tau o a+b.
a^{2}-2ab-3b^{2}
Pahekotia te ab me -3ba, ka -2ab.