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Algebra 2
Notes Lesson 5.6
Name __________________________________
Additive Inverse Find the additive inverse of each number.
1. -2 + 5i
3. 4 – 3i
2. -5i
Adding/Subtracting Complex Numbers Simplify each expression.
1. (5 + 7i) + (-2 + 6i)
2. (8 + 3i) – (2 + 4i)
Multiplying Complex Numbers Simplify each expression.
4. -3 – 2i
REMEMBER: add like terms
3. 7 – (3 + 2i)
2. (12i)(7i)
3. (2 + 3i)(-3 + 5i)
5. (-2i)(5i)
6. (-6i)2
7. (9 + 4i)2
Finding Complex Solutions Solve each equation.
2.
3x2 + 48 = 0
4. z2 = -7
5. -5x2 – 3 = 0
4. (4 – 6i) + 3i
REMEMBER: i2 = -1
1. (5i)(-4i)
1. 4x2 + 100 = 0
5. -4 + 7i
3. 3x2 + 2 = -62
4. (4 – 9i)(4 + 3i)
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