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Practice With Imaginary Powers

Total questions: 9

Worksheet time: 9mins

Name
Class
Date
1.

Solve.   x² = √-36

a)

x = ± 6

b)

x = 6i

c)

x = ± 6i

d)

x = i√6

2.

Solve    x² = √-25

a)

x = -5

b)

x = ± 5i

c)

x = √5

d)

x = ± 5

3.

Solve.   x² = √-40

a)

x = 4i√10

b)

x = ± 2√10

c)

x = ± 2i√10

d)

x = ± 10i√2

4.

Solve.   x² = √-90

a)

x = 3√10

b)

x = 9i√10

c)

x = ± 3√10

d)

x = ± 3i√10

5.

Solve.
  x² = √-100

a)

x = 10i

b)

x = ± 10i

c)

x = ±10

d)

x = √10

6.

Solve.
4x² - 7 = -10

a)

x = ± (3i)/2

b)

x = ± (i√3)/2

c)

x = ± (i√3)/4

d)

x = ± (i√6)/4

7.

Solve.
 25x² + 18 = 2

a)

x = ± (i√4)/25

b)

x = ± (-4)/5

c)

x = ± (-8)/5

d)

x = ± (4i)/5

8.

Solve.  
x² +12 = 5

a)

x = ± 49

b)

x = ± i√7

c)

x = ± √7

d)

x = ± 3.5i

9.

Solve.
 3x² + 2 = 12

a)

x = ± (i√30)/3

b)

x = ± √10

c)

x = ± (√30)/3

d)

x = ± (i√13)/3