( (x+9)(x-9) ) में कौन सा पद नहीं आएगा?
Which term will not appear in ( (x+9)(x-9) )?
Explanation opens after your attempt
Correct Answer
B. (18x)
Concept
( (x+9)(x-9)=x-2-81 ), so the middle term cancels. Exam tip: opposite sign terms add to zero.
Why this answer is correct
The correct answer is B. (18x). ( (x+9)(x-9)=x-2-81 ), so the middle term cancels. Exam tip: opposite sign terms add to zero.
Exam Tip
( (x+9)(x-9)=x-2-81 ) होता है, बीच का पद कट जाता है। परीक्षा में विपरीत चिन्ह वाले पदों का योग शून्य देखें।
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