Question

efetue : ( -10-3i) +( 9-7i)+(3-i)-(4-11i)

Answer 1

$(-10-3i)+(9-7i)+(3-i)-(4-11i)$

$-10-3i+9-7i+3-i-4+11i$

$(-10+9+3-4)+(-3i-7i-i+11i)= -2$