Quick picks on quadratics

Exercise and reference answers

Questions

1. Question

   In a plus ib, the number a is the:

   Choices

   1. Real part
   2. Imaginary part
   3. Modulus

   Correct choice

   Real part

2. Question

   Flipping the sign of b gives the:

   Choices

   1. Modulus
   2. Conjugate
   3. Argument

   Correct choice

   Conjugate

3. Question

   Complex numbers are plotted in the:

   Choices

   1. Real line
   2. Polar sphere
   3. Argand plane

   Correct choice

   Argand plane

4. Question

   A polynomial equation has at least:

   Choices

   1. One root
   2. Two roots
   3. No roots

   Correct choice

   One root

5. Question

   The symbol i was first introduced by:

   Choices

   1. Hamilton
   2. Euler
   3. Newton

   Correct choice

   Euler

Instructions

Tap the correct answer before the round moves on.

Explanation