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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=-3\left(x^{2}-6x+9\right)+8
Whakamahia te ture huarua \left(a-b\right)^{2}=a^{2}-2ab+b^{2} hei whakaroha \left(x-3\right)^{2}.
y=-3x^{2}+18x-27+8
Whakamahia te āhuatanga tohatoha hei whakarea te -3 ki te x^{2}-6x+9.
y=-3x^{2}+18x-19
Tāpirihia te -27 ki te 8, ka -19.