Datrys 4+12left(x-yright)+9left(x-yright)^2

$$4+12 \left( x-y \right) +9 { \left(x-y \right) }^{ 2 }$$

Enrhifo

$$\left(3x-3y+2\right)^{2}$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi 12 â x-y.

$$4+12x-12y+9\left(x-y\right)^{2}$$

Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-y\right)^{2}.

$$4+12x-12y+9\left(x^{2}-2xy+y^{2}\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi 9 â x^{2}-2xy+y^{2}.

$$4+12x-12y+9x^{2}-18xy+9y^{2}$$

Ehangu

$$9x^{2}-18xy+12x+9y^{2}-12y+4$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi 12 â x-y.

$$4+12x-12y+9\left(x-y\right)^{2}$$

Defnyddio'r theorem binomaidd \left(a-b\right)^{2}=a^{2}-2ab+b^{2} i ehangu'r \left(x-y\right)^{2}.

$$4+12x-12y+9\left(x^{2}-2xy+y^{2}\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi 9 â x^{2}-2xy+y^{2}.

$$4+12x-12y+9x^{2}-18xy+9y^{2}$$