Quiz 2 Review- Complex, Completing the Sq, Quad For

Simplify √-28

• -√28
• -2i√7
• 2i√7
• 28i

Simplify:

(10+ 15i) - (48 - 30i)

• 58 - 45i

• 58 - 15i

• -38 - 15i

• -38 + 45i

Tags

CCSS.HSN.CN.A.2

Calculate: 
(1 − 2i) + (-4 + 2i)

• -3
• -3 − 4i
• 5 − 4i
• 5

Tags

CCSS.HSN.CN.A.2

 $Simplify:\ \ \left(-2\ +\ 7i\right)\left(4\ -\ 2i\right)$  

•  $6+\ 32i$  

•  $-6\ +\ 32i$  

•  $22+32i$  

•  $6\ +\ 24i$  

Tags

CCSS.HSN.CN.A.2

 $Simplify:\ \left(i\right)\left(3i\right)$  

• -3i

• -3

• 3

• 2i

Tags

CCSS.HSN.CN.A.2

What does i² = ?

• -1
• √-1
• 1
• -√1

Tags

CCSS.HSN.CN.A.1

(2i)(3i)

• 5i
• -5
• 6i
• -6

Tags

CCSS.HSN.CN.A.2

 $-7i\cdot4i$  

Tags

CCSS.HSN.CN.A.2

What is the first step to solving THIS equation by completing the square?
a² + 10a + 21 = 0

• Set the equation equal to zero
• Divide 10 by 2 and add the result to both sides
• Add a² and 10a together
• Subtract the 21

Tags

CCSS.HSA-REI.B.4B

What did you need to add to both sides to complete the square?

  $x^2-12x+_{ }$  ___ =  20 + ___

• 6

• 36

• 10

• 144

Tags

CCSS.HSA-REI.B.4B