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4\times 5+4\left(-i\right)+2i\times 5+2\left(-1\right)i^{2}
Me whakarea ngā tau matatini 4+2i me 5-i pēnā i te whakarea huarua.
4\times 5+4\left(-i\right)+2i\times 5+2\left(-1\right)\left(-1\right)
Hei tōna tikanga, ko te i^{2} ko -1.
20-4i+10i+2
Mahia ngā whakarea.
20+2+\left(-4+10\right)i
Whakakotahitia ngā wāhi tūturu me ngā wāhi pōhewa.
22+6i
Mahia ngā tāpiri.
Re(4\times 5+4\left(-i\right)+2i\times 5+2\left(-1\right)i^{2})
Me whakarea ngā tau matatini 4+2i me 5-i pēnā i te whakarea huarua.
Re(4\times 5+4\left(-i\right)+2i\times 5+2\left(-1\right)\left(-1\right))
Hei tōna tikanga, ko te i^{2} ko -1.
Re(20-4i+10i+2)
Mahia ngā whakarea i roto o 4\times 5+4\left(-i\right)+2i\times 5+2\left(-1\right)\left(-1\right).
Re(20+2+\left(-4+10\right)i)
Whakakotahitia ngā wāhi tūturu me ngā wāhi pōhewa ki 20-4i+10i+2.
Re(22+6i)
Mahia ngā tāpiri i roto o 20+2+\left(-4+10\right)i.
22
Ko te wāhi tūturu o 22+6i ko 22.