\(यदि (P_1={x:x\in \mathbb{N}\) और \(x^2-10x+21=0}), तो (P_1) कौन सा है\)?

\(If (P_1={x:x\in \mathbb{N}\) and \(x^2-10x+21=0}), which is (P_1)\)?

Explanation opens after your attempt
Correct Answer

A. \(P_1={3,7}\)

Step 1

Concept

Factorize \(x^2-10x+21=0\).

Step 2

Why this answer is correct

((x-3)(x-7)=0), so (x=3,7).

Step 3

Exam Tip

After finding solutions, check that they are natural numbers. चरण 1: समीकरण \(x^2-10x+21=0\) को गुणनखंड करें। चरण 2: ((x-3)(x-7)=0), इसलिए (x=3,7)। चरण 3: हल मिलने के बाद देखें कि वे प्राकृत संख्याएँ हैं या नहीं।

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Mathematics Answer, Explanation and Revision Hints

\(यदि (P_1={x:x\in \mathbb{N}\) और x-2-10x+21=0}), तो \(P_1\) कौन सा है? \(/ If (P_1={x:x\in \mathbb{N}\) and \(x^2-10x+21=0}), which is (P_1)\)?

Correct Answer: A. \(P_1={3,7}\). Explanation: चरण 1: समीकरण \(x^2-10x+21=0\) को गुणनखंड करें। चरण 2: ((x-3)(x-7)=0), इसलिए (x=3,7)। चरण 3: हल मिलने के बाद देखें कि वे प्राकृत संख्याएँ हैं या नहीं। / Step 1: Factorize \(x^2-10x+21=0\). Step 2: ((x-3)(x-7)=0), so (x=3,7). Step 3: After finding solutions, check that they are natural numbers.

Which concept should I revise for this Mathematics MCQ?

Factorize \(x^2-10x+21=0\).

What exam hint can help solve this Mathematics question?

After finding solutions, check that they are natural numbers. चरण 1: समीकरण \(x^2-10x+21=0\) को गुणनखंड करें। चरण 2: ((x-3)(x-7)=0), इसलिए (x=3,7)। चरण 3: हल मिलने के बाद देखें कि वे प्राकृत संख्याएँ हैं या नहीं।