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Whakaoti mō y
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Whakaoti mō x (complex solution)
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Whakaoti mō x
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Tohaina

y=4\left(x^{2}-2x+1\right)-4
Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-1\right)^{2}.
y=4x^{2}-8x+4-4
Whakamahia te āhuatanga tohatoha hei whakarea te 4 ki te x^{2}-2x+1.
y=4x^{2}-8x
Tangohia te 4 i te 4, ka 0.