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Whakaoti mō x
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Tohaina

x^{2}+2x+1=x^{2}-3
Whakamahia te ture huarua \left(a+b\right)^{2}=a^{2}+2ab+b^{2} hei whakaroha \left(x+1\right)^{2}.
x^{2}+2x+1-x^{2}=-3
Tangohia te x^{2} mai i ngā taha e rua.
2x+1=-3
Pahekotia te x^{2} me -x^{2}, ka 0.
2x=-3-1
Tangohia te 1 mai i ngā taha e rua.
2x=-4
Tangohia te 1 i te -3, ka -4.
x=\frac{-4}{2}
Whakawehea ngā taha e rua ki te 2.
x=-2
Whakawehea te -4 ki te 2, kia riro ko -2.