Whakaoti i te y=-x(x-1)(x-4)

$$y = - x ( x - 1 ) ( x - 4 )$$

Whakaoti mō y

$$y=-x\left(x-4\right)\left(x-1\right)$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te -x ki te x-1.

$$y=\left(\left(-x\right)x-\left(-x\right)\right)\left(x-4\right)$$

Whakareatia te -1 ki te -1, ka 1.

$$y=\left(\left(-x\right)x+x\right)\left(x-4\right)$$

Whakamahia te āhuatanga tohatoha hei whakarea te \left(-x\right)x+x ki te x-4.

$$y=\left(-x\right)x^{2}-4\left(-x\right)x+x^{2}-4x$$

Whakareatia te -4 ki te -1, ka 4.

$$y=\left(-x\right)x^{2}+4xx+x^{2}-4x$$

Whakareatia te x ki te x, ka x^{2}.

$$y=\left(-x\right)x^{2}+4x^{2}+x^{2}-4x$$

Pahekotia te 4x^{2} me x^{2}, ka 5x^{2}.

$$y=\left(-x\right)x^{2}+5x^{2}-4x$$

Hei whakarea i ngā pū o te pūtake kotahi, me tāpiri ō rātou taupū. Tāpiria te 1 me te 2 kia riro ai te 3.

$$y=-x^{3}+5x^{2}-4x$$