( (a-b+c)2 ) में (ab) वाला पद कौन सा होगा?
Which term containing (ab) appears in ( (a-b+c)2 )?
Explanation opens after your attempt
B. (-2ab)
Concept
The mixed term of (a) and (-b) is \(2\times a\times(-b)=-2ab\). Exam tip: keep the negative sign with the term.
Why this answer is correct
The correct answer is B. (-2ab). The mixed term of (a) and (-b) is \(2\times a\times(-b)=-2ab\). Exam tip: keep the negative sign with the term.
Exam Tip
(a) और (-b) का मिश्र पद \(2\times a\times(-b)=-2ab\) है। परीक्षा में ऋण चिन्ह को पद के साथ रखें।
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