Question

A complex number z satisfies the equation z^2=3 +4i which of the following is true about z?

Answer 1

Complete question

$(3+4i)^2 = (3+4i)(3+4i) =\\ 9 + 12i + 12i + 16i² = \\ 9 + 24i+16(-1) =\\ 9 -16 +24i=\\ -7i+24i$

$\therefore$ The correct option is the last option$.$