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Whakaoti mō x
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Tohaina

x=\frac{2i}{1+i}
Whakawehea ngā taha e rua ki te 1+i.
x=\frac{2i\left(1-i\right)}{\left(1+i\right)\left(1-i\right)}
Me whakarea te taurunga me te tauraro o \frac{2i}{1+i} ki te haumi hiato o te tauraro, 1-i.
x=\frac{2i\left(1-i\right)}{1^{2}-i^{2}}
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=\frac{2i\left(1-i\right)}{2}
Hei tōna tikanga, ko te i^{2} ko -1. Tātaitia te tauraro.
x=\frac{2i\times 1+2\left(-1\right)i^{2}}{2}
Whakareatia 2i ki te 1-i.
x=\frac{2i\times 1+2\left(-1\right)\left(-1\right)}{2}
Hei tōna tikanga, ko te i^{2} ko -1.
x=\frac{2+2i}{2}
Mahia ngā whakarea i roto o 2i\times 1+2\left(-1\right)\left(-1\right). Whakaraupapatia anō ngā kīanga tau.
x=1+i
Whakawehea te 2+2i ki te 2, kia riro ko 1+i.