(-7-4i)(-12-7i) eching

$$( - 7 - 4 i ) ( - 12 - 7 i )$$

Baholash

$$56+97i$$

Yechim qadamlari

Binomlarni ko‘paytirgandek -7-4i va -12-7i murakkab sonlarni ko‘paytiring.

$$-7\left(-12\right)-7\times \left(-7i\right)-4i\left(-12\right)-4\left(-7\right)i^{2}$$

Ta’rifi bo‘yicha, i^{2} – bu -1.

$$-7\left(-12\right)-7\times \left(-7i\right)-4i\left(-12\right)-4\left(-7\right)\left(-1\right)$$

Ko‘paytirishlarni bajaring.

$$84+49i+48i-28$$

Real va mavhum qismlarni birlashtiring.

$$84-28+\left(49+48\right)i$$

Qo‘shishlarni bajaring.

$$56+97i$$

Ashyoviy qism

$$56$$

Yechim qadamlari

Binomlarni ko‘paytirgandek -7-4i va -12-7i murakkab sonlarni ko‘paytiring.

$$Re(-7\left(-12\right)-7\times \left(-7i\right)-4i\left(-12\right)-4\left(-7\right)i^{2})$$

Ta’rifi bo‘yicha, i^{2} – bu -1.

$$Re(-7\left(-12\right)-7\times \left(-7i\right)-4i\left(-12\right)-4\left(-7\right)\left(-1\right))$$

-7\left(-12\right)-7\times \left(-7i\right)-4i\left(-12\right)-4\left(-7\right)\left(-1\right) ichidagi ko‘paytirishlarni bajaring.

$$Re(84+49i+48i-28)$$

84+49i+48i-28 ichida real va mavhum qismlarni birlashtiring.

$$Re(84-28+\left(49+48\right)i)$$

84-28+\left(49+48\right)i ichida qo‘shishlarni bajaring.

$$Re(56+97i)$$

56+97i ning real qismi – 56.

$$56$$