Complex Numbers and Quadratic Equations Quiz

The video tutorial covers solving problems involving complex numbers, including multiplication, finding equivalent forms using conjugates, and simplifying complex fractions. It also addresses solving quadratic equations with complex solutions using the quadratic formula. The tutorial emphasizes understanding the properties of imaginary unit 'i' and its applications in various mathematical operations.

What is the result of multiplying 4i by 6i?

• 24i

• -24

• 24

• -24i

Tags

CCSS.HSN.CN.A.3

What is the conjugate of the complex number 3 + i?

• -3 - i

• -3 + i

• 3 - i

• 3 + i

Tags

CCSS.HSN.CN.C.8

What is the simplified form of (3 + i)(3 - i)?

• 9

• 6

• 10

• 12

Tags

CCSS.HSN.CN.C.8

What is the result of multiplying a complex number by its conjugate?

• A real number

• An imaginary number

• A complex number

• Zero

Tags

CCSS.HSN.CN.A.3

How do you rewrite 1/(a + bi) to remove the imaginary part from the denominator?

• Multiply by bi

• Multiply by 1

• Multiply by a - bi

• Multiply by a + bi

Tags

CCSS.HSN.CN.C.8

What is the result of (a - bi)(a + bi)?

• a^2 + 2ab + b^2

• a^2 - 2ab + b^2

• a^2 + b^2

• a^2 - b^2

Tags

CCSS.HSA-REI.B.4B

What is the quadratic formula used to solve x^2 + 2x + 2 = 0?

• x = -b ± √(b^2 - 4ac) / 2a

• x = b ± √(b^2 + 4ac) / 2a

• x = b ± √(b^2 - 4ac) / 2a

• x = -b ± √(b^2 + 4ac) / 2a

Tags

CCSS.HSA-REI.B.4B

CCSS.HSN.CN.C.7

What are the solutions to the equation x^2 + 2x + 2 = 0?

• -2 ± i

• 1 ± i

• 2 ± i

• -1 ± i

Tags

CCSS.HSN.CN.A.1

What is the value of i squared?

• i

• -1

• -i

• 1

Tags

CCSS.HSN.CN.A.3

What is the result of dividing -2 ± 2i by 2?

• -2 ± i

• -1 ± i

• 1 ± i

• 2 ± i

Tags

CCSS.HSN.CN.A.3