(\left\(\sqrt{7}+1\right\)2) का मान क्या है?
What is the value of (\left\(\sqrt{7}+1\right\)2)?
Explanation opens after your attempt
Correct Answer
A. \(8+2\sqrt{7}\)
Concept
Use ((a+b)2=a-2+2ab+b-2).
Why this answer is correct
(\(\sqrt{7}\)2+2\sqrt{7}\times1+12=7+2\sqrt{7}+1=8+2\sqrt{7}).
Exam Tip
Forgetting the middle term (2ab) is a common mistake. चरण 1: ((a+b)2=a-2+2ab+b-2) लगाएं। चरण 2: (\(\sqrt{7}\)2+2\sqrt{7}\times1+12=7+2\sqrt{7}+1=8+2\sqrt{7})। चरण 3: मध्य पद (2ab) को भूलना सामान्य गलती है।
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