( (3x+2)(3x+5) ) का प्रसार कौन सा है?

Which is the expansion of ( (3x+2)(3x+5) )?

Author: Muft Shiksha Editorial Team Published:
Explanation opens after your attempt
Correct Answer

B. \(9x^2+21x+10\)

Step 1

Concept

\(3x\cdot5+2\cdot3x=15x+6x=21x\). Exam tip: add both cross terms.

Step 2

Why this answer is correct

The correct answer is B. \(9x^2+21x+10\). \(3x\cdot5+2\cdot3x=15x+6x=21x\). Exam tip: add both cross terms.

Step 3

Exam Tip

\(3x\cdot5+2\cdot3x=15x+6x=21x\) है। परीक्षा में दोनों क्रॉस पद जोड़ें।

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Mathematics Answer, Explanation and Revision Hints

( (3x+2)(3x+5) ) का प्रसार कौन सा है? / Which is the expansion of ( (3x+2)(3x+5) )?

Correct Answer: B. \(9x^2+21x+10\). Explanation: \(3x\cdot5+2\cdot3x=15x+6x=21x\) है। परीक्षा में दोनों क्रॉस पद जोड़ें। / \(3x\cdot5+2\cdot3x=15x+6x=21x\). Exam tip: add both cross terms.

Which concept should I revise for this Mathematics MCQ?

\(3x\cdot5+2\cdot3x=15x+6x=21x\). Exam tip: add both cross terms.

What exam hint can help solve this Mathematics question?

\(3x\cdot5+2\cdot3x=15x+6x=21x\) है। परीक्षा में दोनों क्रॉस पद जोड़ें।