Whakaoti i te (2+5i)(3+4i)=

$$( 2 + 5 i ) ( 3 + 4 i ) =$$

Aromātai

$$-14+23i$$

Ngā Upane Otinga

Me whakarea ngā tau matatini 2+5i me 3+4i pēnā i te whakarea huarua.

$$2\times 3+2\times \left(4i\right)+5i\times 3+5\times 4i^{2}$$

Hei tōna tikanga, ko te i^{2} ko -1.

$$2\times 3+2\times \left(4i\right)+5i\times 3+5\times 4\left(-1\right)$$

Mahia ngā whakarea.

$$6+8i+15i-20$$

Whakakotahitia ngā wāhi tūturu me ngā wāhi pōhewa.

$$6-20+\left(8+15\right)i$$

Mahia ngā tāpiri.

$$-14+23i$$

Wāhi Tūturu

$$-14$$

Ngā Upane Otinga

Me whakarea ngā tau matatini 2+5i me 3+4i pēnā i te whakarea huarua.

$$Re(2\times 3+2\times \left(4i\right)+5i\times 3+5\times 4i^{2})$$

Hei tōna tikanga, ko te i^{2} ko -1.

$$Re(2\times 3+2\times \left(4i\right)+5i\times 3+5\times 4\left(-1\right))$$

Mahia ngā whakarea i roto o 2\times 3+2\times \left(4i\right)+5i\times 3+5\times 4\left(-1\right).

$$Re(6+8i+15i-20)$$

Whakakotahitia ngā wāhi tūturu me ngā wāhi pōhewa ki 6+8i+15i-20.

$$Re(6-20+\left(8+15\right)i)$$

Mahia ngā tāpiri i roto o 6-20+\left(8+15\right)i.

$$Re(-14+23i)$$

Ko te wāhi tūturu o -14+23i ko -14.

$$-14$$