Unit 2 Review

Absolute Value Equations/Inequalities

100

|3x| = 9

x = 3,-3

200

|2x + 3| = 5

x = 1, -4

300

2|4 + x| + 6 > 2

No Solution

400

|-3x + 6| + 4 > 16

x<-2, x>6

Complex Numbers

100

(2 + i) + (-1 + 4i)

1 + 5i

200

(7 - 2i) - (2 - 5i)

5 + 3i

300

(7 + 2i)(9 - 6i)

75 - 24i

400

(-1 - 8i)²

-63 + 15i

500

(sqrt(-15)) x (sqrt(-25))

5(sqrt(15))

Systems of Linear Equations

100

x + y = 8

x - y = 4

x = 6

y = 2

200

3x + 6y - 2z = -6

2x + y + 4z = 19

-5x - 2y + 8z = 62

(-4,3,6)

300

-9x + 3y - 2z = 61

8x + 7y + 5z = -138

5x - 5y + 8z = -45

(-8, -7, -5)

400

4x + 5y - 6z = 2

-3x - 2y + 7z = -15

-x + 4y + 2y = -13

(-3,-2,-4)

500

4r + 6s - t = -18

3r + 2s - 4t = -24

-5r + 3s + 2t = 15

(-2, -1, 4)