( (2p-3q+r)2 ) में (pq) वाला पद क्या होगा?
What will be the (pq)-term in ( (2p-3q+r)2 )?
Explanation opens after your attempt
C. (-12pq)
Concept
Twice the product of (2p) and (-3q) is (2\cdot2p\cdot(-3q)=-12pq). Exam tip: check both pair and sign.
Why this answer is correct
The correct answer is C. (-12pq). Twice the product of (2p) and (-3q) is (2\cdot2p\cdot(-3q)=-12pq). Exam tip: check both pair and sign.
Exam Tip
(2p) और (-3q) का दोगुना गुणनफल (2\cdot2p\cdot(-3q)=-12pq) है। परीक्षा में जोड़े और चिन्ह दोनों देखें।
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