7(x+3)+2x(x-5)-2(x-1)-2x^2 eching

$$7 ( x + 3 ) + 2 x ( x - 5 ) - 2 ( x - 1 ) - 2 x ^ { 2 }$$

Baholash

$$23-5x$$

Yechim qadamlari

7 ga x+3 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.

$$7x+21+2x\left(x-5\right)-2\left(x-1\right)-2x^{2}$$

2x ga x-5 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.

$$7x+21+2x^{2}-10x-2\left(x-1\right)-2x^{2}$$

-3x ni olish uchun 7x va -10x ni birlashtirish.

$$-3x+21+2x^{2}-2\left(x-1\right)-2x^{2}$$

-2 ga x-1 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.

$$-3x+21+2x^{2}-2x+2-2x^{2}$$

-5x ni olish uchun -3x va -2x ni birlashtirish.

$$-5x+21+2x^{2}+2-2x^{2}$$

23 olish uchun 21 va 2'ni qo'shing.

$$-5x+23+2x^{2}-2x^{2}$$

0 ni olish uchun 2x^{2} va -2x^{2} ni birlashtirish.

$$-5x+23$$

Kengaytirish

$$23-5x$$

Yechim qadamlari

7 ga x+3 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.

$$7x+21+2x\left(x-5\right)-2\left(x-1\right)-2x^{2}$$

2x ga x-5 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.

$$7x+21+2x^{2}-10x-2\left(x-1\right)-2x^{2}$$

-3x ni olish uchun 7x va -10x ni birlashtirish.

$$-3x+21+2x^{2}-2\left(x-1\right)-2x^{2}$$

-2 ga x-1 ni ko'paytirish orqali distributiv xususiyatdan foydalanish.

$$-3x+21+2x^{2}-2x+2-2x^{2}$$

-5x ni olish uchun -3x va -2x ni birlashtirish.

$$-5x+21+2x^{2}+2-2x^{2}$$

23 olish uchun 21 va 2'ni qo'shing.

$$-5x+23+2x^{2}-2x^{2}$$

0 ni olish uchun 2x^{2} va -2x^{2} ni birlashtirish.

$$-5x+23$$