If A = 4 + 2i and B = 7 -3i, A - B = ?

a.-3 + 5i

b.-3

c.-3 - i

d.-3 + i

e.1 + 9i

Solve the system: x = y²+ 4y - 5, x = 0.

a.(0, -5) and (1, 1)

b.(4, 4) and (-5, -5)

c.(0, 1) and (0, -5)

d.No solution

e.None of these

The roots of (x + 1)²+ 1 = 0 are:

a.-1, 1

b.-i, i

c.1+i, -1-i

d.-1+i, -1-i

e.None of these