यदि (a+b=7) और (ab=10), तो (3(a+b)-2ab) का मान क्या होगा?
If (a+b=7) and (ab=10), what is the value of (3(a+b)-2ab)?
Explanation opens after your attempt
A. (1)
Concept
Substitute the given whole expressions directly. (3(7)-2(10)=21-20=1).
Why this answer is correct
The correct answer is A. (1). Substitute the given whole expressions directly. (3(7)-2(10)=21-20=1).
Exam Tip
दिए हुए पूरे व्यंजकों को सीधे रखें। (3(7)-2(10)=21-20=1)।
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