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Test Title:

Tests in Complex Numbers

There are 6 tests inside this topic. Click the button below to change currently active quiz.

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Current: Test in Multiplying Complex Numbers
  • Q1:
    1 pts
    Is the following equation true or false? $$i^2 = -1$$
  • Q2:
    1 pts
    Is the following statement true or false? The product of two complex number can be real number.
  • Q3:
    1 pts
    Multiply: $-i\cdot(-i)$.

    1

    -1

    i

    -i

  • Q4:
    1 pts
    Multiply: $(1-i)\cdot(1+i)$.

    2

    -2

    2i

    -2i

  • Q5:
    2 pts
    Multiply: $(3+2i)\cdot(1+i)$.

    1-5i

    -1+5i

    1+5i

    -1-5i

  • Q6:
    2 pts
    Multiply: $(5-3i)\cdot(-2-i)$.

    8-i

    7+i

    12-i

    -13+i

  • Q7:
    2 pts
    Simplify: $(4-2i)^2$

    12-16i

    12+16i

    20-16i

    20+16i

  • Q8:
    3 pts
    With what number do we need to multiply $1+i$ in order to get a real number?

    i

    -i

    1-i

    1+i

  • Q9:
    3 pts
    With what number do we need to multiply $5-3i$ in order to get a real number?

    5-3i

    5+3i

    3-5i

    3+5i

  • Q10:
    3 pts
    Simplify: $3i\cdot(1-i)^2$

    6

    -6

    6i

    -6i