Ребяят ,оочень нужно ,заранее спасибо , заданий 1.2(1 вариант )

1.2 (1) a) [latex] Z_{+} = Z_1 + Z_2 = ( 6 - 3i ) + ( -4 + 3i ) = 6 - 3i - 4 + 3i = 2 \ ; \ \ \  Z_{+} \in R \ ; [/latex] б) [latex] Z_{-} = Z_1 - Z_2 = ( 6 - 3i ) - ( -4 + 3i ) = 6 - 3i + 4 - 3i = 10 - 6i \ ; \ \ \  Z_{-} \notin R \ ; [/latex] в) [latex] Z_x = Z_1 \cdot Z_2 = ( 6 - 3i ) \cdot ( -4 + 3i ) = \\\\ = -24 + 18i + 12i - 9i^2 = -24 + 30i + 9 = -15 + 30i \ ; \ \ \  Z_x \notin R \ ; [/latex] г) [latex] Z_{/} = Z_1 : Z_2 = ( 6 - 3i ) : ( -4 + 3i ) = \\\\ = \frac{ ( 6 - 3i )( -4 - 3i ) }{ ( -4 + 3i )( -4 - 3i ) } = \frac{ -24 - 18i + 12i + 9i^2 }{ 16 - 9i^2 } = \frac{ -24 - 6i - 9 }{ 16 + 9 } = \\\\ = \frac{ -33 - 6i }{ 25 } = \frac{ -132 - 24i }{ 100 } = -1.32 - 0.24i \ ; \ \ \  Z_{/} \notin R \ ; [/latex]