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Tohaina

x^{2}+14x+49-x-7-4
Hei kimi i te tauaro o x+7, kimihia te tauaro o ia taurangi.
x^{2}+13x+49-7-4
Pahekotia te 14x me -x, ka 13x.
x^{2}+13x+42-4
Tangohia te 7 i te 49, ka 42.
x^{2}+13x+38
Tangohia te 4 i te 42, ka 38.
x^{2}+14x+49-x-7-4
Hei kimi i te tauaro o x+7, kimihia te tauaro o ia taurangi.
x^{2}+13x+49-7-4
Pahekotia te 14x me -x, ka 13x.
x^{2}+13x+42-4
Tangohia te 7 i te 49, ka 42.
x^{2}+13x+38
Tangohia te 4 i te 42, ka 38.