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?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. \(x^2-7x+12\)

Step 1

Concept

Signs change when the bracket is subtracted. Thus \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\).

Step 2

Why this answer is correct

The correct answer is A. \(x^2-7x+12\). Signs change when the bracket is subtracted. Thus \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\).

Step 3

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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Mathematics Answer, Explanation and Revision Hints

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?

Correct Answer: A. \(x^2-7x+12\). Explanation: कोष्ठक हटाते समय अंदर के चिन्ह बदलेंगे। इसलिए \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\)। / Signs change when the bracket is subtracted. Thus \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\).

Which concept should I revise for this Mathematics MCQ?

Signs change when the bracket is subtracted. Thus \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\).

What exam hint can help solve this Mathematics question?

कोष्ठक हटाते समय अंदर के चिन्ह बदलेंगे। इसलिए \(2x^2-3x+5-x^2-4x+7=x^2-7x+12\)।