Equations and Complex Numbers

Subtract. (4 - 7i) - (-3 + 6i)

• 7 - 13i

• 7 - i

• 1 - 13i

• 1 - i

Multiply. (2+3i)(2+3i)

• -5

• -5 + 12i

• 13

• 13 + 12i

What should you do first in solving this equation?

• Get factored form.

• Write down: a=1, b=6, c=-13

• Make it equal to 0 by subtracting 3 on each side.

• Type it all in a calculator.

Solve for x: 

• x = {-4, -1}

• x = {-1, -4}

• x = {2+i, 2-i}

• x = {-2+i, -2-i}

What does i² = ?

• -1

• √-1

• 1

• -√1

Simplify:
(3 + 2i) + (4i + 6)

• 9 + 6i

• 7i + 8

• 9 + 6i²

• 9 - 6i

Simplify:
(4 + 7i) - (3 + 2i)

• 1 + 5i

• 7 + 9i

• 1 + 9i

• -1 + 5i

Simplify:
-3i(4 + 2i)

• 6 - 12i

• 6 + 12i

• -12i - 6i²

• -12i + 6i²

Simplify:
(2 - 3i)(5 + 4i)

• 22 - 7i

• 22 + 7i

• 22 - 7i²

• 22 + 7i²

Determine the values of a, b, and c for the quadratic equation:

4x² – 8x = 3

• a = 4, b = -8, c = 3

• a = 4, b =-8, c =-3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = -3