Issolvi =0,8(x+3)(x-5)(x-7)

$$= 0,8 ( x + 3 ) ( x - 5 ) ( x - 7 )$$

Evalwa

$$\frac{4\left(x-7\right)\left(x-5\right)\left(x+3\right)}{5}$$

Passi tas-Soluzzjonijiet

Uża l-propjetà distributtiva biex timmultiplika 0.8 b'x+3.

$$\left(0.8x+2.4\right)\left(x-5\right)\left(x-7\right)$$

Applika l-propjetà distributtiva billi timmultiplika kull terminu ta' 0.8x+2.4 b'kull terminu ta' x-5.

$$\left(0.8x^{2}-4x+2.4x-12\right)\left(x-7\right)$$

Ikkombina -4x u 2.4x biex tikseb -1.6x.

$$\left(0.8x^{2}-1.6x-12\right)\left(x-7\right)$$

Applika l-propjetà distributtiva billi timmultiplika kull terminu ta' 0.8x^{2}-1.6x-12 b'kull terminu ta' x-7.

$$0.8x^{3}-5.6x^{2}-1.6x^{2}+11.2x-12x+84$$

Ikkombina -5.6x^{2} u -1.6x^{2} biex tikseb -7.2x^{2}.

$$0.8x^{3}-7.2x^{2}+11.2x-12x+84$$

Ikkombina 11.2x u -12x biex tikseb -0.8x.

$$0.8x^{3}-7.2x^{2}-0.8x+84$$

Espandi

$$\frac{4x^{3}}{5}-\frac{36x^{2}}{5}-\frac{4x}{5}+84$$

Passi tas-Soluzzjonijiet

Uża l-propjetà distributtiva biex timmultiplika 0.8 b'x+3.

$$\left(0.8x+2.4\right)\left(x-5\right)\left(x-7\right)$$

Applika l-propjetà distributtiva billi timmultiplika kull terminu ta' 0.8x+2.4 b'kull terminu ta' x-5.

$$\left(0.8x^{2}-4x+2.4x-12\right)\left(x-7\right)$$

Ikkombina -4x u 2.4x biex tikseb -1.6x.

$$\left(0.8x^{2}-1.6x-12\right)\left(x-7\right)$$

Applika l-propjetà distributtiva billi timmultiplika kull terminu ta' 0.8x^{2}-1.6x-12 b'kull terminu ta' x-7.

$$0.8x^{3}-5.6x^{2}-1.6x^{2}+11.2x-12x+84$$

Ikkombina -5.6x^{2} u -1.6x^{2} biex tikseb -7.2x^{2}.

$$0.8x^{3}-7.2x^{2}+11.2x-12x+84$$

Ikkombina 11.2x u -12x biex tikseb -0.8x.

$$0.8x^{3}-7.2x^{2}-0.8x+84$$