Class 9 x minus 1 MCQ Questions

Question 1/1 Easy Mathematics Exploring Algebraic Identities Algebraic identities Class 9 Level 65

( (x-1)² ) और \(x^2-1\) में सही अंतर कौन-सा है?

Which is the correct difference between ( (x-1)² ) and \(x^2-1\)?

Explanation opens after your attempt

Correct Answer

A. ( (x-1)²=x^-2-2x+1 ), जबकि (x^-2-1=(x+1)(x-1))

Step 1

Concept

The first is a perfect square and the second is difference of squares. Exam tip: keep bracket square and difference of squares separate.

Step 2

Why this answer is correct

The correct answer is A. ( (x-1)²=x^-2-2x+1 ), जबकि (x^-2-1=(x+1)(x-1)). The first is a perfect square and the second is difference of squares. Exam tip: keep bracket square and difference of squares separate.

Step 3

Exam Tip

पहला पूर्ण वर्ग है और दूसरा वर्गों का अंतर है। परीक्षा में कोष्ठक और वर्गों का अंतर अलग रखें।

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MCQ Data:
Class: Class 9
Subject: Mathematics
Chapter: Exploring Algebraic Identities
Topic: Algebraic identities
Difficulty: Easy
Level: 65

Question Hindi:
( (x-1)^2 ) और (x^2-1) में सही अंतर कौन-सा है?

Question English:
Which is the correct difference between ( (x-1)^2 ) and (x^2-1)?

Options:
A. ( (x-1)^2=x^2-2x+1 ), जबकि (x^2-1=(x+1)(x-1))
B. दोनों हमेशा समान हैं / Both are always same
C. (x^2-1=x^2-2x+1)
D. ( (x-1)^2=x^2+2x+1 )

Correct Answer:
A. ( (x-1)^2=x^2-2x+1 ), जबकि (x^2-1=(x+1)(x-1))

Explanation Hindi:
पहला पूर्ण वर्ग है और दूसरा वर्गों का अंतर है। परीक्षा में कोष्ठक और वर्गों का अंतर अलग रखें।

Explanation English:
The first is a perfect square and the second is difference of squares. Exam tip: keep bracket square and difference of squares separate.

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