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Tohaina

a\left(b+2\right)-3\left(b+2\right)
Mahia te whakarōpūtanga ab+2a-3b-6=\left(ab+2a\right)+\left(-3b-6\right), ka whakatauwehea atu a i te tuatahi me -3 i te rōpū tuarua.
\left(b+2\right)\left(a-3\right)
Whakatauwehea atu te kīanga pātahi b+2 mā te whakamahi i te āhuatanga tātai tohatoha.