What is the value of |z| if z = 4 - 3i?

What is the value of |z| if z = 4 - 3i?

Correct Answer: 5

Step 1: Identify the complex number z, which is given as z = 4 - 3i.
Step 2: Recognize that |z| represents the magnitude (or absolute value) of the complex number.
Step 3: Use the formula for the magnitude of a complex number, which is |z| = √(a^2 + b^2), where a is the real part and b is the imaginary part.
Step 4: In our case, the real part a is 4 and the imaginary part b is -3.
Step 5: Substitute the values into the formula: |z| = √(4^2 + (-3)^2).
Step 6: Calculate 4^2, which is 16.
Step 7: Calculate (-3)^2, which is 9.
Step 8: Add the results from Step 6 and Step 7: 16 + 9 = 25.
Step 9: Take the square root of 25: √25 = 5.
Step 10: Conclude that the value of |z| is 5.

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