0 reads0 ratings0 helpful
What is the value of (3^4-3^2)?
Advertisement
Answer and explanation
Correct answer: 72
Evaluate the powers first: \(3^4=81\) and \(3^2=9\). Therefore, \(3^4-3^2=81-9=72\). Option 81 is only the value of \(3^4\), not the result after subtraction. Exam tip: in expressions with mixed operations, evaluate exponents before addition or subtraction.
Frequently asked questions
What is the correct answer to this question?
72
Why is this the correct answer?
Evaluate the powers first: \(3^4=81\) and \(3^2=9\). Therefore, \(3^4-3^2=81-9=72\). Option 81 is only the value of \(3^4\), not the result after subtraction. Exam tip: in expressions with mixed operations, evaluate exponents before addition or subtraction.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Exponents.
Student feedback
Was this question useful?
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Difficulty
Easy0%
Medium0%
Hard0%
Was the explanation clear?
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
Advertisement