Datrys (5t^2-13t+17)+(9t^3-7t^2+3t-26)-(16t^2+5t-8)

$$( 5 t ^ { 2 } - 13 t + 17 ) + ( 9 t ^ { 3 } - 7 t ^ { 2 } + 3 t - 26 ) - ( 16 t ^ { 2 } + 5 t - 8 )$$

Enrhifo

$$9t^{3}-18t^{2}-15t-1$$

Camau Ateb

Cyfuno 5t^{2} a -7t^{2} i gael -2t^{2}.

$$-2t^{2}-13t+17+9t^{3}+3t-26-\left(16t^{2}+5t-8\right)$$

Cyfuno -13t a 3t i gael -10t.

$$-2t^{2}-10t+17+9t^{3}-26-\left(16t^{2}+5t-8\right)$$

Tynnu 26 o 17 i gael -9.

$$-2t^{2}-10t-9+9t^{3}-\left(16t^{2}+5t-8\right)$$

I ddod o hyd i wrthwyneb 16t^{2}+5t-8, dewch o hyd i wrthwyneb pob term.

$$-2t^{2}-10t-9+9t^{3}-16t^{2}-5t+8$$

Cyfuno -2t^{2} a -16t^{2} i gael -18t^{2}.

$$-18t^{2}-10t-9+9t^{3}-5t+8$$

Cyfuno -10t a -5t i gael -15t.

$$-18t^{2}-15t-9+9t^{3}+8$$

Adio -9 a 8 i gael -1.

$$-18t^{2}-15t-1+9t^{3}$$

Ehangu

$$9t^{3}-18t^{2}-15t-1$$

Camau Ateb

Cyfuno 5t^{2} a -7t^{2} i gael -2t^{2}.

$$-2t^{2}-13t+17+9t^{3}+3t-26-\left(16t^{2}+5t-8\right)$$

Cyfuno -13t a 3t i gael -10t.

$$-2t^{2}-10t+17+9t^{3}-26-\left(16t^{2}+5t-8\right)$$

Tynnu 26 o 17 i gael -9.

$$-2t^{2}-10t-9+9t^{3}-\left(16t^{2}+5t-8\right)$$

I ddod o hyd i wrthwyneb 16t^{2}+5t-8, dewch o hyd i wrthwyneb pob term.

$$-2t^{2}-10t-9+9t^{3}-16t^{2}-5t+8$$

Cyfuno -2t^{2} a -16t^{2} i gael -18t^{2}.

$$-18t^{2}-10t-9+9t^{3}-5t+8$$

Cyfuno -10t a -5t i gael -15t.

$$-18t^{2}-15t-9+9t^{3}+8$$

Adio -9 a 8 i gael -1.

$$-18t^{2}-15t-1+9t^{3}$$