किस विकल्प में \(3x^2-2x+7\) में से \(x^2+4x-5\) घटाने का सही परिणाम है?
Which option gives the correct result of subtracting \(x^2+4x-5\) from \(3x^2-2x+7\)?
Explanation opens after your attempt
A. \(2x^2-6x+12\)
Concept
(\(3x^2-2x+7\)-\(x^2+4x-5\)=2x-2-6x+12). Change all signs of the second expression while subtracting.
Why this answer is correct
The correct answer is A. \(2x^2-6x+12\). (\(3x^2-2x+7\)-\(x^2+4x-5\)=2x-2-6x+12). Change all signs of the second expression while subtracting.
Exam Tip
(\(3x^2-2x+7\)-\(x^2+4x-5\)=2x-2-6x+12)। घटाते समय दूसरे व्यंजक के सभी चिह्न बदलें।
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