Whakaoti i te -y(2y+9)(10-11y)

$$-y(2y+9)(10-11y)$$

Aromātai

$$-y\left(10-11y\right)\left(2y+9\right)$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te -y ki te 2y+9.

$$\left(2\left(-y\right)y+9\left(-y\right)\right)\left(10-11y\right)$$

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 2\left(-y\right)y+9\left(-y\right) ki ia tau o 10-11y.

$$20\left(-y\right)y-22\left(-y\right)y^{2}+90\left(-y\right)-99\left(-y\right)y$$

Whakareatia te -22 ki te -1, ka 22.

$$20\left(-y\right)y+22yy^{2}+90\left(-y\right)-99\left(-y\right)y$$

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.

$$20\left(-y\right)y+22y^{3}+90\left(-y\right)-99\left(-y\right)y$$

Whakareatia te -99 ki te -1, ka 99.

$$20\left(-y\right)y+22y^{3}+90\left(-y\right)+99yy$$

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

$$20\left(-y\right)y+22y^{3}+90\left(-y\right)+99y^{2}$$

Whakareatia te 20 ki te -1, ka -20.

$$-20yy+22y^{3}+90\left(-1\right)y+99y^{2}$$

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

$$-20y^{2}+22y^{3}+90\left(-1\right)y+99y^{2}$$

Whakareatia te 90 ki te -1, ka -90.

$$-20y^{2}+22y^{3}-90y+99y^{2}$$

Pahekotia te -20y^{2} me 99y^{2}, ka 79y^{2}.

$$79y^{2}+22y^{3}-90y$$

Whakaroha

$$22y^{3}+79y^{2}-90y$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te -y ki te 2y+9.

$$\left(2\left(-y\right)y+9\left(-y\right)\right)\left(10-11y\right)$$

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 2\left(-y\right)y+9\left(-y\right) ki ia tau o 10-11y.

$$20\left(-y\right)y-22\left(-y\right)y^{2}+90\left(-y\right)-99\left(-y\right)y$$

Whakareatia te -22 ki te -1, ka 22.

$$20\left(-y\right)y+22yy^{2}+90\left(-y\right)-99\left(-y\right)y$$

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.

$$20\left(-y\right)y+22y^{3}+90\left(-y\right)-99\left(-y\right)y$$

Whakareatia te -99 ki te -1, ka 99.

$$20\left(-y\right)y+22y^{3}+90\left(-y\right)+99yy$$

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

$$20\left(-y\right)y+22y^{3}+90\left(-y\right)+99y^{2}$$

Whakareatia te 20 ki te -1, ka -20.

$$-20yy+22y^{3}+90\left(-1\right)y+99y^{2}$$

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

$$-20y^{2}+22y^{3}+90\left(-1\right)y+99y^{2}$$

Whakareatia te 90 ki te -1, ka -90.

$$-20y^{2}+22y^{3}-90y+99y^{2}$$

Pahekotia te -20y^{2} me 99y^{2}, ka 79y^{2}.

$$79y^{2}+22y^{3}-90y$$