Quadratic Formula and Complex Numbers

What does i² = ?

• -1
• √-1
• 1
• -√1

Tags

TEKS.MATH.P.9B

Simplify:
(3 + 2i) + (4i + 6)

• 9 + 6i
• 7i + 8
• 9 + 6i²
• 9 - 6i

Tags

CCSS.HSN.CN.A.2

Simplify:
(4 + 7i) - (3 + 2i)

• 1 + 5i
• 7 + 9i
• 1 + 9i
• -1 + 5i

Tags

CCSS.HSN.CN.A.2

Simplify:

-3i (4 + 2i)

• 6 - 12i

• 6 + 12i

• -12i - 6i²

• -12i + 6i²

Tags

CCSS.HSN.CN.A.2

Simplify:
(2 - 3i)(5 + 4i)

• 22 - 7i
• 22 + 7i
• 22 - 7i²
• 22 + 7i²

Tags

CCSS.HSN.CN.C.8

Determine the values of a, b, and c for the quadratic equation:

4x² – 8x = 3

• a = 4, b = -8, c = 3

• a = 4, b =-8, c = - 3

• a = 4, b = 8, c = 3

• a = 4, b = 8, c = - 3

Tags

CCSS.HSA.CED.A.1

CCSS.HSA.REI.A.1

CCSS.HSA.REI.B.4

Use the quadratic formula to find the solutions for
 $y=-x^2-5x+12$  

• No Real Solution

•  $\frac{5\pm\sqrt{73}}{-2}$  

•  $\frac{-5\pm\sqrt{73}}{-2}$  

•  $\frac{5\pm\sqrt{73}}{2}$  

Tags

CCSS.HSA-REI.B.4B

 $x^2-2x-8=0$  Solve using the Quadratic Formula:

•  $\frac{-1\pm\sqrt{73}}{6}$  

•  $-4,\ 2$  

•  $-2,\ 4$  

•  $-3,\ 2$  

Tags

CCSS.HSA-REI.B.4B

Solve using the quadratic formula.  $f\left(x\right)=2x^2-4x+7$  

•  $\frac{2\pm2i\sqrt{10}}{2}$  

•  $\frac{4\pm\sqrt{40}}{4}$  

•  $\frac{2\pm i\sqrt{10}}{2}$  

•  $\frac{2\pm2i\sqrt{40}}{4}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

Solve using the Quadratic Formula: $-x^2+4x=13$  

•  $2\pm3i$  

•  $-2\pm3i$  

•  $2\pm i\sqrt{17}$  

•  $-2\pm i\sqrt{17}$  

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7