\(7x^2-4x+9\) और \(-3x^2+8x-2\) का योग क्या होगा?

What is the sum of \(7x^2-4x+9\) and \(-3x^2+8x-2\)?

Explanation opens after your attempt
Correct Answer

B. \(4x^2+4x+7\)

Step 1

Concept

Adding like terms gives \(7x^2-3x^2=4x^2\), (-4x+8x=4x), and (9-2=7).

Step 2

Why this answer is correct

The correct answer is B. \(4x^2+4x+7\). Adding like terms gives \(7x^2-3x^2=4x^2\), (-4x+8x=4x), and (9-2=7).

Step 3

Exam Tip

समान पद जोड़ने पर \(7x^2-3x^2=4x^2\), (-4x+8x=4x), और (9-2=7)।

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Mathematics Answer, Explanation and Revision Hints

\(7x^2-4x+9\) और \(-3x^2+8x-2\) का योग क्या होगा? / What is the sum of \(7x^2-4x+9\) and \(-3x^2+8x-2\)?

Correct Answer: B. \(4x^2+4x+7\). Explanation: समान पद जोड़ने पर \(7x^2-3x^2=4x^2\), (-4x+8x=4x), और (9-2=7)। / Adding like terms gives \(7x^2-3x^2=4x^2\), (-4x+8x=4x), and (9-2=7).

Which concept should I revise for this Mathematics MCQ?

Adding like terms gives \(7x^2-3x^2=4x^2\), (-4x+8x=4x), and (9-2=7).

What exam hint can help solve this Mathematics question?

समान पद जोड़ने पर \(7x^2-3x^2=4x^2\), (-4x+8x=4x), और (9-2=7)।