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Calculate the value of 8^2 - 4^2. (2021)

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Question: Calculate the value of 8^2 - 4^2. (2021)

Options:

  1. 48
  2. 60
  3. 50
  4. 40

Correct Answer: 48

Exam Year: 2021

Solution: 

8^2 = 64 and 4^2 = 16, so 64 - 16 = 48.

Calculate the value of 8^2 - 4^2. (2021)

Practice Questions

Q1
Calculate the value of 8^2 - 4^2. (2021)
  1. 48
  2. 60
  3. 50
  4. 40

Questions & Step-by-Step Solutions

Calculate the value of 8^2 - 4^2. (2021)
  • Step 1: Calculate 8 squared (8^2). This means multiplying 8 by itself: 8 * 8 = 64.
  • Step 2: Calculate 4 squared (4^2). This means multiplying 4 by itself: 4 * 4 = 16.
  • Step 3: Subtract the result of 4^2 from the result of 8^2: 64 - 16.
  • Step 4: Perform the subtraction: 64 - 16 = 48.
  • Exponents – Understanding how to calculate powers of numbers.
  • Difference of Squares – Recognizing that the expression can be simplified using the difference of squares formula.
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