Quadratics Revisited

Q1. i⁷⁹

• i

• -1

• 1

• -i

Q2. What does i² = ?

• -1

• $\sqrt{-1}$

• 1

• $\sqrt{1}$

Q3. Simplify the equation

• y⁶4x⁶

• y⁶x⁻⁶/4

• 4x⁶y⁶

• y⁶/4x⁶

Q4. Simplify  $\sqrt{-4}$  

• 2i

• 4i

• 2

• -2i

• i

Q5. Simplify

• 5

• -5i

• -5

• 5i

Q6. 15y² * (2y)³

• 30y⁵

• 30y⁶

• 120y⁵

• 120y⁶

Q7. (5-2i) + (-7+8i)

• 12+6i

• -2+6i

• -35 -16i

• -35-16i²

Q8. What is the complex conjugate of 4-3i?

• 1/(4+3i)

• 4 + 3i

• 1/(4-3i)

• -4 + 3i

Q9. Solve

(x+3)²-5 = 9

• ±11

• ±5

• √14 - 3

• ±√14 -3

Q10. Solve

(x-3)² = -20

• ±i√17

• ±√17

• ±2i√5 +3

• ±2√5 +3