left(x^2+x-1right)left(2x^3-5x+8right)--(18x+5 eching

$$\left( { x }^{ 2 } +x-1 \right) \left( 2 { x }^{ 3 } -5x+8 \right) --(18x+5$$

Baholash

$$\left(x^{2}+x-1\right)\left(2x^{3}-5x+8\right)+18x+5$$

Yechim qadamlari

x^{2}+x-1 ga 2x^{3}-5x+8 ni ko‘paytirish orqali distributiv xususiyatdan foydalaning va ifoda sifatida birlashtiring.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8-\left(-\left(18x+5\right)\right)$$

18x+5 teskarisini topish uchun har birining teskarisini toping.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8-\left(-18x-5\right)$$

-18x-5 teskarisini topish uchun har birining teskarisini toping.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8+18x+5$$

31x ni olish uchun 13x va 18x ni birlashtirish.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+31x-8+5$$

-3 olish uchun -8 va 5'ni qo'shing.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+31x-3$$

Kengaytirish

$$2x^{5}+2x^{4}-7x^{3}+3x^{2}+31x-3$$

Yechim qadamlari

x^{2}+x-1 ga 2x^{3}-5x+8 ni ko‘paytirish orqali distributiv xususiyatdan foydalaning va ifoda sifatida birlashtiring.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8-\left(-\left(18x+5\right)\right)$$

18x+5 teskarisini topish uchun har birining teskarisini toping.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8-\left(-18x-5\right)$$

-18x-5 teskarisini topish uchun har birining teskarisini toping.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+13x-8+18x+5$$

31x ni olish uchun 13x va 18x ni birlashtirish.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+31x-8+5$$

-3 olish uchun -8 va 5'ni qo'shing.

$$2x^{5}-7x^{3}+3x^{2}+2x^{4}+31x-3$$