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• Tests in Complex Numbers
Test Title:

# Tests in Complex Numbers

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

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