Datrys -x(x-7.2)(x-15.6)

$$- x ( x - 7.2 ) ( x - 15.6 )$$

Enrhifo

$$-x\left(x-15.6\right)\left(x-7.2\right)$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi -x â x-7.2.

$$\left(\left(-x\right)x-7.2\left(-x\right)\right)\left(x-15.6\right)$$

Lluosi -7.2 a -1 i gael 7.2.

$$\left(\left(-x\right)x+7.2x\right)\left(x-15.6\right)$$

Cyfrifwch y briodoledd ddosrannol drwy luosi pob \left(-x\right)x+7.2x gan bob x-15.6.

$$\left(-x\right)x^{2}-15.6\left(-x\right)x+7.2x^{2}-112.32x$$

Lluosi -15.6 a -1 i gael 15.6.

$$\left(-x\right)x^{2}+15.6xx+7.2x^{2}-112.32x$$

Lluosi x a x i gael x^{2}.

$$\left(-x\right)x^{2}+15.6x^{2}+7.2x^{2}-112.32x$$

Cyfuno 15.6x^{2} a 7.2x^{2} i gael 22.8x^{2}.

$$\left(-x\right)x^{2}+22.8x^{2}-112.32x$$

Er mwyn lluosi pwerau sy’n rhannu’r un sail, adiwch eu esbonyddion. Adiwch 1 a 2 i gael 3.

$$-x^{3}+22.8x^{2}-112.32x$$

Ehangu

$$-\left(x^{3}-\frac{114x^{2}}{5}+\frac{2808x}{25}\right)$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi -x â x-7.2.

$$\left(\left(-x\right)x-7.2\left(-x\right)\right)\left(x-15.6\right)$$

Lluosi -7.2 a -1 i gael 7.2.

$$\left(\left(-x\right)x+7.2x\right)\left(x-15.6\right)$$

Cyfrifwch y briodoledd ddosrannol drwy luosi pob \left(-x\right)x+7.2x gan bob x-15.6.

$$\left(-x\right)x^{2}-15.6\left(-x\right)x+7.2x^{2}-112.32x$$

Lluosi -15.6 a -1 i gael 15.6.

$$\left(-x\right)x^{2}+15.6xx+7.2x^{2}-112.32x$$

Lluosi x a x i gael x^{2}.

$$\left(-x\right)x^{2}+15.6x^{2}+7.2x^{2}-112.32x$$

Cyfuno 15.6x^{2} a 7.2x^{2} i gael 22.8x^{2}.

$$\left(-x\right)x^{2}+22.8x^{2}-112.32x$$

Er mwyn lluosi pwerau sy’n rhannu’r un sail, adiwch eu esbonyddion. Adiwch 1 a 2 i gael 3.

$$-x^{3}+22.8x^{2}-112.32x$$