Let x = a + bi and y = c + di and z = f + gi

Which statements are true? theres multiple answers

a. x + y = y + x

b. (x * y) * z = x * (y * z)

c. x - y = y - x

d. (x + y) + z = x + (y + z)

e. (x - y) - z = x - (y - z)

True statements:

a) x + y = y + x ⇒ commutative property of addition

b) (x * y) * z = x * (y * z) ⇒ associative property of multiplication

d) (x + y) + z = x + (y + z) ⇒ associative property of addition

False statements:

c) x - y = y - x should be: x - y = - y + x

e) (x - y) - z = x - (y - z) should be: (x - y) - z = x - (y + z)