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Whakaroha
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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

x^{2}-2^{2}-\left(x-4\right)
Whakaarohia te \left(x-2\right)\left(x+2\right). Ka taea te whakareanga te panoni ki te rerekētanga o ngā pūrua mā te ture: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
x^{2}-4-\left(x-4\right)
Tātaihia te 2 mā te pū o 2, kia riro ko 4.
x^{2}-4-x-\left(-4\right)
Hei kimi i te tauaro o x-4, kimihia te tauaro o ia taurangi.
x^{2}-4-x+4
Ko te tauaro o -4 ko 4.
x^{2}-x
Tāpirihia te -4 ki te 4, ka 0.
x^{2}-2^{2}-\left(x-4\right)
Whakaarohia te \left(x-2\right)\left(x+2\right). Ka taea te whakareanga te panoni ki te rerekētanga o ngā pūrua mā te ture: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}.
x^{2}-4-\left(x-4\right)
Tātaihia te 2 mā te pū o 2, kia riro ko 4.
x^{2}-4-x-\left(-4\right)
Hei kimi i te tauaro o x-4, kimihia te tauaro o ia taurangi.
x^{2}-4-x+4
Ko te tauaro o -4 ko 4.
x^{2}-x
Tāpirihia te -4 ki te 4, ka 0.