समीकरण \(x^2+2px+49=0\) के वास्तविक मूल होने की शर्त कौन-सी है?
What is the condition for \(x^2+2px+49=0\) to have real roots?
Explanation opens after your attempt
Correct Answer
A. \(p\leq -7\) या \(p\geq7\)\(p\leq -7\) or \(p\geq7\)
Concept
For real roots, \(D\geq0\) is required. Here \(4p^2-196\geq0\), so \(p\leq-7\) or \(p\geq7\).
Why this answer is correct
The correct answer is A. \(p\leq -7\) या \(p\geq7\) / \(p\leq -7\) or \(p\geq7\). For real roots, \(D\geq0\) is required. Here \(4p^2-196\geq0\), so \(p\leq-7\) or \(p\geq7\).
Exam Tip
वास्तविक मूलों के लिए \(D\geq0\) होना चाहिए। यहाँ \(4p^2-196\geq0\), इसलिए \(p\leq-7\) या \(p\geq7\)।
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