यदि (D=-(b+3)2) है, तो समान वास्तविक मूल कब होंगे?
If (D=-(b+3)2), when will the roots be real and equal?
Explanation opens after your attempt
A. (b=-3)
Concept
For real and equal roots, (D=0) is needed. From (-(b+3)2=0), we get (b=-3).
Why this answer is correct
The correct answer is A. (b=-3). For real and equal roots, (D=0) is needed. From (-(b+3)2=0), we get (b=-3).
Exam Tip
समान वास्तविक मूलों के लिए (D=0) चाहिए। (-(b+3)2=0) से (b=-3) मिलता है।
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