यदि \(x^2+px+q=0\) की जड़ें (-3) और (7) हैं, तो (p-q) का मान क्या है?

If the roots of \(x^2+px+q=0\) are (-3) and (7), what is the value of (p-q)?

Explanation opens after your attempt
Correct Answer

C. (17)

Step 1

Concept

The sum of roots is (4), so (p=-4). The product is (-21), so (q=-21), hence (p-q=17).

Step 2

Why this answer is correct

The correct answer is C. (17). The sum of roots is (4), so (p=-4). The product is (-21), so (q=-21), hence (p-q=17).

Step 3

Exam Tip

जड़ों का योग (4) है, इसलिए (p=-4)। गुणनफल (-21) है, इसलिए (q=-21), अतः (p-q=17)।

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Mathematics Answer, Explanation and Revision Hints

यदि \(x^2+px+q=0\) की जड़ें (-3) और (7) हैं, तो (p-q) का मान क्या है? / If the roots of \(x^2+px+q=0\) are (-3) and (7), what is the value of (p-q)?

Correct Answer: C. (17). Explanation: जड़ों का योग (4) है, इसलिए (p=-4)। गुणनफल (-21) है, इसलिए (q=-21), अतः (p-q=17)। / The sum of roots is (4), so (p=-4). The product is (-21), so (q=-21), hence (p-q=17).

Which concept should I revise for this Mathematics MCQ?

The sum of roots is (4), so (p=-4). The product is (-21), so (q=-21), hence (p-q=17).

What exam hint can help solve this Mathematics question?

जड़ों का योग (4) है, इसलिए (p=-4)। गुणनफल (-21) है, इसलिए (q=-21), अतः (p-q=17)।