Section 3.2 Quadratics & Imaginary Numbers

Which of the following equations has both x=2 and x=-3 as solutions?

• (x - 2)(x + 3) = 0

• (x + 2)(x + 3) = 0

• (x - 2)(-x + 3) = 0

• (x + 2)(x - 3) = 0

• x - 2 = x - 3

Tags

CCSS.HSA.REI.B.4

CCSS.HSA.APR.B.2

CCSS.HSA.APR.B.3

Which of the following gives all the solutions of  $x^2-x=12$  

• -4 and 3

• -3 and 4

• -2 and 6

• 12 and 13

• 13 only

Simplify $\left(2+5i\right)\left(3-4i\right)$ . Put complex numbers in Standard Form.

•  $7i+26$  

•  $26+7i$  

•  $6+7i-20i^2$  

•  $-20i^2+6+7i$  

Simplify √-4

• 2i
• -2i
• 2
• 4i

Tags

CCSS.HSN.CN.A.2

CCSS.HSN.CN.A.1

Simplify -√-8

• -i√8
• -2i√2
• 2i√2
• -8i

Tags

CCSS.HSN.CN.A.2

CCSS.HSN.CN.A.1

CCSS.HSN.RN.A.2

Calculate:
(4 − 7i) − (-3 + 6i)

• 7 − 13i
• 7 − i 
• 1 − 13i
• 1 − i 

Tags

CCSS.HSN.CN.A.2

Calculate: 
(1 − 2i) + (-4 + 2i)

• -3
• -3 − 4i
• 5 − 4i
• 5

Tags

CCSS.HSN.CN.A.2

What does i² =  ?

• 1
• -1
• √-1
• √1

Tags

CCSS.HSN.CN.A.1

Calculate:
-4 (13 + 5i) 

• -52 − 20i
• 9 + i
• 17 − 20i
• -52 + 20i

Tags

CCSS.HSN.CN.A.2

Find the conjugate of:
5 + 7i

• 5 − 7i
• -5 − 7i
• -5 + 7i

Tags

CCSS.8.EE.A.2