If (b^2=256) then what is the positive value of (b)?
Answer and explanation
Correct answer: 16
Given \(b^2=256\), we get \(b=\pm\sqrt{256}=\pm16\). Since the question asks for the positive value of \(b\), the correct answer is \(16\). Although 18 is close, \(18^2=324\), not 256. Exam tip: A squared variable can have two values, but choose the positive square root when a positive value is asked.
Frequently asked questions
What is the correct answer to this question?
16
Why is this the correct answer?
Given \(b^2=256\), we get \(b=\pm\sqrt{256}=\pm16\). Since the question asks for the positive value of \(b\), the correct answer is \(16\). Although 18 is close, \(18^2=324\), not 256. Exam tip: A squared variable can have two values, but choose the positive square root when a positive value is asked.
Which subject and chapter does this question cover?
This is a Class 9 Mathematics question. Chapter: Number Systems. Topic: Exponents.
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