यदि (a+b=9) और (ab=14), तो (3(a+b)-2ab) का मान क्या होगा?
If (a+b=9) and (ab=14), what is the value of (3(a+b)-2ab)?
Explanation opens after your attempt
A. (-1)
Concept
Using the given values gives (3(9)-2(14)=27-28=-1). Treat the whole (a+b) as one value.
Why this answer is correct
The correct answer is A. (-1). Using the given values gives (3(9)-2(14)=27-28=-1). Treat the whole (a+b) as one value.
Exam Tip
दिए गए मान रखने पर (3(9)-2(14)=27-28=-1) मिलता है। पूरे (a+b) को एक मान की तरह लें।
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