( (x+5)(x-5) ) और ( (x-5)2 ) में क्या मुख्य अंतर है?
What is the main difference between ( (x+5)(x-5) ) and ( (x-5)2 )?
Explanation opens after your attempt
A. पहला \(x^2-25\) है और दूसरा \(x^2-10x+25\) हैThe first is \(x^2-25\) and the second is \(x^2-10x+25\)
Concept
In opposite-sign product mixed terms cancel but in a square the middle term remains. Exam tip: do not mix the two forms.
Why this answer is correct
The correct answer is A. पहला \(x^2-25\) है और दूसरा \(x^2-10x+25\) है / The first is \(x^2-25\) and the second is \(x^2-10x+25\). In opposite-sign product mixed terms cancel but in a square the middle term remains. Exam tip: do not mix the two forms.
Exam Tip
विपरीत चिन्ह वाले गुणन में मिश्र पद कटता है पर वर्ग में मध्य पद रहता है। परीक्षा में दोनों रूपों को न मिलाएँ।
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