यदि (p+q=9) और \(p^2+q^2=41\), तो (pq) क्या है?

If (p+q=9) and \(p^2+q^2=41\), what is (pq)?

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

A. (20)correct value

Step 1

Concept

((p+q)2=p-2+q-2+2pq), so (81=41+2pq) and (pq=20). In exams find (2pq) first.

Step 2

Why this answer is correct

The correct answer is A. (20) / correct value. ((p+q)2=p-2+q-2+2pq), so (81=41+2pq) and (pq=20). In exams find (2pq) first.

Step 3

Exam Tip

((p+q)2=p-2+q-2+2pq), इसलिए (81=41+2pq) और (pq=20) है। परीक्षा में (2pq) पहले निकालें।

Question me issue ya doubt hai?

Answer, explanation, typing mistake ya suggestion directly hamari team ko bhejein. 📱Helpline (Call / WhatsApp): +91 7272824365

Related Mathematics Questions

FAQs

Mathematics Answer, Explanation and Revision Hints

यदि (p+q=9) और \(p^2+q^2=41\), तो (pq) क्या है? / If (p+q=9) and \(p^2+q^2=41\), what is (pq)?

Correct Answer: A. (20) / correct value. Explanation: ((p+q)2=p-2+q-2+2pq), इसलिए (81=41+2pq) और (pq=20) है। परीक्षा में (2pq) पहले निकालें। / ((p+q)2=p-2+q-2+2pq), so (81=41+2pq) and (pq=20). In exams find (2pq) first.

Which concept should I revise for this Mathematics MCQ?

((p+q)2=p-2+q-2+2pq), so (81=41+2pq) and (pq=20). In exams find (2pq) first.

What exam hint can help solve this Mathematics question?

((p+q)2=p-2+q-2+2pq), इसलिए (81=41+2pq) और (pq=20) है। परीक्षा में (2pq) पहले निकालें।