(4-5i)(1-4i) eching

$$( 4 - 5 i ) ( 1 - 4 i )$$

Baholash

$$-16-21i$$

Yechim qadamlari

Binomlarni ko‘paytirgandek 4-5i va 1-4i murakkab sonlarni ko‘paytiring.

$$4\times 1+4\times \left(-4i\right)-5i-5\left(-4\right)i^{2}$$

Ta’rifi bo‘yicha, i^{2} – bu -1.

$$4\times 1+4\times \left(-4i\right)-5i-5\left(-4\right)\left(-1\right)$$

Ko‘paytirishlarni bajaring.

$$4-16i-5i-20$$

Real va mavhum qismlarni birlashtiring.

$$4-20+\left(-16-5\right)i$$

Qo‘shishlarni bajaring.

$$-16-21i$$

Ashyoviy qism

$$-16$$

Yechim qadamlari

Binomlarni ko‘paytirgandek 4-5i va 1-4i murakkab sonlarni ko‘paytiring.

$$Re(4\times 1+4\times \left(-4i\right)-5i-5\left(-4\right)i^{2})$$

Ta’rifi bo‘yicha, i^{2} – bu -1.

$$Re(4\times 1+4\times \left(-4i\right)-5i-5\left(-4\right)\left(-1\right))$$

4\times 1+4\times \left(-4i\right)-5i-5\left(-4\right)\left(-1\right) ichidagi ko‘paytirishlarni bajaring.

$$Re(4-16i-5i-20)$$

4-16i-5i-20 ichida real va mavhum qismlarni birlashtiring.

$$Re(4-20+\left(-16-5\right)i)$$

4-20+\left(-16-5\right)i ichida qo‘shishlarni bajaring.

$$Re(-16-21i)$$

-16-21i ning real qismi – -16.

$$-16$$