यदि (2x-2-3x+5-\(x^2+4x-7\)) को सरल किया जाए, तो परिणाम क्या होगा?
If (2x-2-3x+5-\(x^2+4x-7\)) is simplified, what is the result?
Explanation opens after your attempt
A. \(x^2-7x+12\)
Concept
Signs change when the bracket is subtracted. Thus \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\).
Why this answer is correct
The correct answer is A. \(x^2-7x+12\). Signs change when the bracket is subtracted. Thus \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\).
Exam Tip
कोष्ठक हटाते समय अंदर के चिन्ह बदलेंगे। इसलिए \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\)।
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