यदि \(x^2+px+q=0\) की जड़ें (-2) और (5) हैं, तो (p-q) का मान क्या है?

If the roots of \(x^2+px+q=0\) are (-2) and (5), what is (p-q)?

Explanation opens after your attempt
Correct Answer

A. (7)

Step 1

Concept

The sum of roots is (3), so (p=-3). The product is (-10), so (q=-10), hence (p-q=7).

Step 2

Why this answer is correct

The correct answer is A. (7). The sum of roots is (3), so (p=-3). The product is (-10), so (q=-10), hence (p-q=7).

Step 3

Exam Tip

जड़ों का योग (3) है, इसलिए (p=-3)। गुणनफल (-10) है, इसलिए (q=-10), अतः (p-q=7)।

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Mathematics Answer, Explanation and Revision Hints

यदि \(x^2+px+q=0\) की जड़ें (-2) और (5) हैं, तो (p-q) का मान क्या है? / If the roots of \(x^2+px+q=0\) are (-2) and (5), what is (p-q)?

Correct Answer: A. (7). Explanation: जड़ों का योग (3) है, इसलिए (p=-3)। गुणनफल (-10) है, इसलिए (q=-10), अतः (p-q=7)। / The sum of roots is (3), so (p=-3). The product is (-10), so (q=-10), hence (p-q=7).

Which concept should I revise for this Mathematics MCQ?

The sum of roots is (3), so (p=-3). The product is (-10), so (q=-10), hence (p-q=7).

What exam hint can help solve this Mathematics question?

जड़ों का योग (3) है, इसलिए (p=-3)। गुणनफल (-10) है, इसलिए (q=-10), अतः (p-q=7)।