Evaluate the sum, and write the result in the form a + bi. (Simplify your answer completely.) (2 + 5i) + 3i

Perform the operations and simplify: write the results in a+bi form. ADD: (-9-5i) + (19-7i) SUBTRACT: (-9-5i) - (19-7i)

Evaluate (2i + 1)2¹ in a closed form. Justify your answer. i=1

Multiply. (x + 12)2 (x+ 12)? = (Simplify your answer.)

Multiply and type in your answer in the box below. Write the result in a + bi form (5+2i) (3 -11i)