Datrys (m^2+m+1)(m+1)+(m^2-m-1)(m-1)-2m(m^2+1)

$$( m ^ { 2 } + m + 1 ) ( m + 1 ) + ( m ^ { 2 } - m - 1 ) ( m - 1 ) - 2 m ( m ^ { 2 } + 1 )$$

Enrhifo

$$2$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi m^{2}+m+1 â m+1 a chyfuno termau tebyg.

$$m^{3}+2m^{2}+2m+1+\left(m^{2}-m-1\right)\left(m-1\right)-2m\left(m^{2}+1\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi m^{2}-m-1 â m-1 a chyfuno termau tebyg.

$$m^{3}+2m^{2}+2m+1+m^{3}-2m^{2}+1-2m\left(m^{2}+1\right)$$

Cyfuno m^{3} a m^{3} i gael 2m^{3}.

$$2m^{3}+2m^{2}+2m+1-2m^{2}+1-2m\left(m^{2}+1\right)$$

Cyfuno 2m^{2} a -2m^{2} i gael 0.

$$2m^{3}+2m+1+1-2m\left(m^{2}+1\right)$$

Adio 1 a 1 i gael 2.

$$2m^{3}+2m+2-2m\left(m^{2}+1\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi -2m â m^{2}+1.

$$2m^{3}+2m+2-2m^{3}-2m$$

Cyfuno 2m^{3} a -2m^{3} i gael 0.

$$2m+2-2m$$

Cyfuno 2m a -2m i gael 0.

$$2$$

Ffactor

$$2$$