(\(\sqrt{20}+\sqrt{45}\)\(\sqrt{20}-\sqrt{45}\)) का मान क्या है?
What is the value of (\(\sqrt{20}+\sqrt{45}\)\(\sqrt{20}-\sqrt{45}\))?
Explanation opens after your attempt
A. (-25)
Concept
This is the \(a^2-b^2\) form, so the value is (20-45=-25). In conjugate multiplication take the difference of squares directly.
Why this answer is correct
The correct answer is A. (-25). This is the \(a^2-b^2\) form, so the value is (20-45=-25). In conjugate multiplication take the difference of squares directly.
Exam Tip
यह \(a^2-b^2\) रूप है, इसलिए मान (20-45=-25) है। संयुग्मी गुणन में सीधे वर्गों का अंतर लें।
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