Whakaoti i te -2x*(1.5x-4)+(4x-1)*(-x+8)=

$$- 2 x \cdot ( 1.5 x - 4 ) + ( 4 x - 1 ) \cdot ( - x + 8 ) =$$

Aromātai

$$-7x^{2}+41x-8$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te -2x ki te 1.5x-4.

$$-3x^{2}+8x+\left(4x-1\right)\left(-x+8\right)$$

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 4x-1 ki ia tau o -x+8.

$$-3x^{2}+8x+4x\left(-x\right)+32x-\left(-x\right)-8$$

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

$$-3x^{2}+8x+4x\left(-x\right)+32x+x-8$$

Pahekotia te 32x me x, ka 33x.

$$-3x^{2}+8x+4x\left(-x\right)+33x-8$$

Pahekotia te 8x me 33x, ka 41x.

$$-3x^{2}+41x+4x\left(-x\right)-8$$

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

$$-3x^{2}+41x+4x^{2}\left(-1\right)-8$$

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

$$-3x^{2}+41x-4x^{2}-8$$

Pahekotia te -3x^{2} me -4x^{2}, ka -7x^{2}.

$$-7x^{2}+41x-8$$

Whakaroha

$$-7x^{2}+41x-8$$

Ngā Upane Otinga

Whakamahia te āhuatanga tohatoha hei whakarea te -2x ki te 1.5x-4.

$$-3x^{2}+8x+\left(4x-1\right)\left(-x+8\right)$$

Me hoatu te āhuatanga tohatoha mā te whakarea ia tau o 4x-1 ki ia tau o -x+8.

$$-3x^{2}+8x+4x\left(-x\right)+32x-\left(-x\right)-8$$

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

$$-3x^{2}+8x+4x\left(-x\right)+32x+x-8$$

Pahekotia te 32x me x, ka 33x.

$$-3x^{2}+8x+4x\left(-x\right)+33x-8$$

Pahekotia te 8x me 33x, ka 41x.

$$-3x^{2}+41x+4x\left(-x\right)-8$$

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

$$-3x^{2}+41x+4x^{2}\left(-1\right)-8$$

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

$$-3x^{2}+41x-4x^{2}-8$$

Pahekotia te -3x^{2} me -4x^{2}, ka -7x^{2}.

$$-7x^{2}+41x-8$$