Question

simplifying the expression (–1 + i) + (21 + 5i)?

Answer 1

that's -1 + i + 21 + 5i

= 20 + 6i

Answer 2

(–1 + i) + (21 + 5i) + 0
–1 + (i + 21) + 5i
(–1 + 21) + (i + 5i)
–(1 – i) + (21 + 5i)

Answer 3

which one of those?

Answer 4

3rd one

Answer 5

what we are doing..is putting together the real numbers, and then grouping together the imaginary numbers

Answer 6

help me out


Which property of multiplication is shown below?

If x = a + bi and y = c + di, x × y = y × x



commutative property
identity property
distributive property
associative property