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What is the value of (12^2-4^2)?
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Answer and explanation
Correct answer: 128
First evaluate the squares: \(12^2=144\) and \(4^2=16\). Therefore, \(12^2-4^2=144-16=128\), so 128 is correct. An answer such as 124 may result from an arithmetic error in subtraction. Exam tip: evaluate exponents before performing addition or subtraction.
Frequently asked questions
What is the correct answer to this question?
128
Why is this the correct answer?
First evaluate the squares: \(12^2=144\) and \(4^2=16\). Therefore, \(12^2-4^2=144-16=128\), so 128 is correct. An answer such as 124 may result from an arithmetic error in subtraction. Exam tip: evaluate exponents before performing addition or subtraction.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Exponents.
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