4-1.Complex numbers
normal

જો $z_1, z_2, z_3$ એ સમીકરણ $z^3 - z^2(4 + 3i) + z(3 + 8i) - 5i = 0$ ના બીજો હોય તો $Re(z_1) + Re(z_2) + Re(z_3)$ ની કિમત મેળવો 

A

$0$

B

$-1$

C

$3$

D

$4$

Solution

$z = 1$ satisfies the equation $(z – 1)(z^2 – z(3 + 3i) + 5i) = 0$ $(z – 1)(z – (2 + i))(z – (1 + 2i)) = 0$

Standard 11
Mathematics

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