Pre-Calculus - Adding two complex numbers - Online Tutor (8+ root(-18)) + (5- root(-50))

What is the correct way to add the real parts of two complex numbers in the form a + bi and c + di?

• b + d

• a + c

• a + b

• c + d

When simplifying a negative number under a square root, what is the first step?

• Add 1 to the number

• Divide by 2

• Multiply by 2

• Factor out the negative to introduce 'i'

How can you express sqrt(-18) in terms of imaginary numbers?

• 3i * sqrt(2)

• i * sqrt(18)

• i * sqrt(9)

• 3 * sqrt(2)

What is the result of adding the imaginary parts 3i * sqrt(2) and 5i * sqrt(2)?

• 15i * sqrt(2)

• 8i * sqrt(2)

• 13i * sqrt(2)

• 2i * sqrt(2)

In the example given, what is the final result of adding the complex numbers 8 + 3i * sqrt(2) and 5 + 5i * sqrt(2)?

• 3 + 5i * sqrt(2)

• 13 - 2i * sqrt(2)

• 8 + 5i * sqrt(2)

• 13 + 8i * sqrt(2)