Datrys =(4x+3)^2-2(5x-3)(x+1)-2x(3x+10)

$$= ( 4 x + 3 ) ^ { 2 } - 2 ( 5 x - 3 ) ( x + 1 ) - 2 x ( 3 x + 10 )$$

Enrhifo

$$15$$

Camau Ateb

Defnyddio'r theorem binomaidd \left(a+b\right)^{2}=a^{2}+2ab+b^{2} i ehangu'r \left(4x+3\right)^{2}.

$$16x^{2}+24x+9-2\left(5x-3\right)\left(x+1\right)-2x\left(3x+10\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi -2 â 5x-3.

$$16x^{2}+24x+9+\left(-10x+6\right)\left(x+1\right)-2x\left(3x+10\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi -10x+6 â x+1 a chyfuno termau tebyg.

$$16x^{2}+24x+9-10x^{2}-4x+6-2x\left(3x+10\right)$$

Cyfuno 16x^{2} a -10x^{2} i gael 6x^{2}.

$$6x^{2}+24x+9-4x+6-2x\left(3x+10\right)$$

Cyfuno 24x a -4x i gael 20x.

$$6x^{2}+20x+9+6-2x\left(3x+10\right)$$

Adio 9 a 6 i gael 15.

$$6x^{2}+20x+15-2x\left(3x+10\right)$$

Defnyddio’r briodwedd ddosbarthu i luosi -2x â 3x+10.

$$6x^{2}+20x+15-6x^{2}-20x$$

Cyfuno 6x^{2} a -6x^{2} i gael 0.

$$20x+15-20x$$

Cyfuno 20x a -20x i gael 0.

$$15$$

Ffactor

$$3\times 5$$