Task Sets: Add, subtract, and multiply complex numbers - Common Core Math - HS Number and Quantity

1.

Compute $(3 + 2i) + (5 - i)$ . Write the real part only. Enter a number.

2.

Compute $(4 + 3i) - (1 + 5i)$ . Write the imaginary part (the coefficient of $i$ ). Enter a number.

3.

Compute $(2 + 3i)(1 - 4i)$ .

A.

$2 - 12i^2$

B.

$2 - 5i - 12i^2$ (not yet simplified)

C.

$14 - 5i$

D.

$-10 - 5i$

4.

Compute $(1 + 2i)^2$ .

A.

$1 + 4i^2 = 1 - 4 = -3$

B.

$5$

C.

$-3 + 4i$

D.

$1 + 4$

5.

Compute $(3 + 4i)(3 - 4i)$ . Enter the numerical result (it will be a real number).

Exercises: Add, Subtract, and Multiply Complex Numbers