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