2.for what value of k the given equation have equal roots
y2 +6y+k=0
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3
Answer:
in English
The given equation has equal roots
⇒ Discriminant=b
2
−4a=0
where a=2b−(−2),c=−1
⇒(−2)
2
−4×2×1=0
⇒(−2)
2
=8
⇒k−2=±
8
=±2
2
∴k=2±2
2
Step-by-step explanation:
in hindi
दिए गए समीकरण में समान जड़ें हैं
⇒ विभेदक=ख
2
-4 ए=0
कहाँ पे ए=2ख-(-2 ),सी=- 1
⇒(-2 )
2
-4×2×1=0
⇒(-2 )
2
=8
⇒क-2=±
8
=± २
2
∴क=2±2
2
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