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McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

Study Guide and Review

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Exercise 18 Page 217

Recall that i^2=- 1 and sqrt(- 1)=i.

28+3i

Practice makes perfect

We will start by distributing the expression and then simplifying further.

(6+5i)(3-2i)

▼

Distribute

Distribute (3-2i)

6(3-2i)+5i(3-2i)

Distribute 6

18-12i+5i(3-2i)

Distribute 5i

18-12i+15i-10i^2

i^2=- 1

18-12i+15i-10(-1)

a(- b)=- a * b

18-12i+15i+10

Add and subtract terms

28+3i

Subchapter links

1 Solving Quadratic Equations by Factoring p.217

2 Complex Numbers p.217

3 The Quadratic Formula and the Discriminant p.218

4 Transformations of Quadratic Graphs p.218

5 Quadratic Inequalities p.219

Practice Test p.219