Question

DAU COROANĂ!!!
1. Fie z₁ =3+4i si Z₂ =4-2i. Calculati: 0.5 p a) 22₁ +3Z₂ = 0.5 p b) Z₁ Z₂ = . 1p c) = 4₁_ Z2

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Answer 1

a) 2(3+4i) + 3(4-2i) = 6+8i+12-6i = 2i+18

b) (3+4i)(4-2i) = 12-6i+16i-8i² = 10i+12+8 = 20+10i = 10(2+5i)

c) (3+4i) / (4-2i) amplifici cu 4+2i = (3+4i)(4+2i) / (4-2i)(4+2i) = (20+10i) / (16+4) = 10(2+5i) / 20 = (2+5i) / 2