Identify Real and Complex Parts

In z= 4-3i, the real number part is _______.

Write the expression in the form of a+bi, where a and b are real numbers.

3 ⋅ √-25

• 15

• -15

• 15i

• -15i

The real number part is __.

• Irrational Number

• Real Number

• Imaginary Number

• Complex Number

The imaginary part of 5 is...

• 5

• -5

• 0

• None of the above

X and Y axis represent ______ Respectively

• Real and Real parts

• Real and Imaginary parts

• Imaginary parts

• Imaginary and Real parts

We're off to a good start learning about operations on imaginary numbers! Now let's try something complex (meaning a number with a real and imaginary part) Identify the real part in this complex number 7+3i

• 7

• 3

• i

• 3i

Answer explanation

In the complex number 7+3i, the real part is the coefficient of the real component, which is 7. The imaginary part is represented by 3i, where 3 is the coefficient of the imaginary unit i.

What is the sum of 6+3i and 7+12i

• 18+10i

• 13+15i

• 15+13i

• 10+18i

Answer explanation

To add the complex numbers 6+3i and 7+12i, combine the real parts (6+7) and the imaginary parts (3i+12i). This gives 13 for the real part and 15i for the imaginary part, resulting in 13+15i, which is the correct answer.

What is the real portion of the number \(3+5i\)

• 3

• 5

• -3

• -5