Question 723179
{{{ 3i*( 2 + 5i ) = x + 6i }}}
Use the definitions:
{{{ i = sqrt(-1) }}}
{{{ i^2 = -1 }}}
{{{ 6i + 15i^2 = x + 6i }}}
{{{ x = 15i^2 }}}
{{{ x = 15*(-1) }}}
A. {{{ x = -15 }}}