Datrys 7(2x+3)(6x+2)-6x(2x+13)+8(7x+2)

$$7 ( 2 x + 3 ) ( 6 x + 2 ) - 6 x ( 2 x + 13 ) + 8 ( 7 x + 2 )$$

Enrhifo

$$72x^{2}+132x+58$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi 7 â 2x+3.

$$\left(14x+21\right)\left(6x+2\right)-6x\left(2x+13\right)+8\left(7x+2\right)$$

Cyfrifwch y briodoledd ddosrannol drwy luosi pob 14x+21 gan bob 6x+2.

$$84x^{2}+28x+126x+42-6x\left(2x+13\right)+8\left(7x+2\right)$$

Cyfuno 28x a 126x i gael 154x.

$$84x^{2}+154x+42-6x\left(2x+13\right)+8\left(7x+2\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi 8 â 7x+2.

$$84x^{2}+154x+42-6x\left(2x+13\right)+56x+16$$

Defnyddio’r briodwedd ddosbarthu i luosi -6x â 2x+13.

$$84x^{2}+154x+42-12x^{2}-78x+56x+16$$

Cyfuno 84x^{2} a -12x^{2} i gael 72x^{2}.

$$72x^{2}+154x+42-78x+56x+16$$

Cyfuno 154x a -78x i gael 76x.

$$72x^{2}+76x+42+56x+16$$

Cyfuno 76x a 56x i gael 132x.

$$72x^{2}+132x+42+16$$

Adio 42 a 16 i gael 58.

$$72x^{2}+132x+58$$

Ehangu

$$72x^{2}+132x+58$$

Camau Ateb

Defnyddio’r briodwedd ddosbarthu i luosi 7 â 2x+3.

$$\left(14x+21\right)\left(6x+2\right)-6x\left(2x+13\right)+8\left(7x+2\right)$$

Cyfrifwch y briodoledd ddosrannol drwy luosi pob 14x+21 gan bob 6x+2.

$$84x^{2}+28x+126x+42-6x\left(2x+13\right)+8\left(7x+2\right)$$

Cyfuno 28x a 126x i gael 154x.

$$84x^{2}+154x+42-6x\left(2x+13\right)+8\left(7x+2\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi 8 â 7x+2.

$$84x^{2}+154x+42-6x\left(2x+13\right)+56x+16$$

Defnyddio’r briodwedd ddosbarthu i luosi -6x â 2x+13.

$$84x^{2}+154x+42-12x^{2}-78x+56x+16$$

Cyfuno 84x^{2} a -12x^{2} i gael 72x^{2}.

$$72x^{2}+154x+42-78x+56x+16$$

Cyfuno 154x a -78x i gael 76x.

$$72x^{2}+76x+42+56x+16$$

Cyfuno 76x a 56x i gael 132x.

$$72x^{2}+132x+42+16$$

Adio 42 a 16 i gael 58.

$$72x^{2}+132x+58$$