Question

For what value of k,the following equation has equal roots

kx²+6x+ 1 = 0

1) k = 9
2) k = -9
3) k = 0​

Answer 1

Answer:

1) k = 9

Step-by-step explanation:

ax² + bx + c = 0 has equal roots if D = b² - 4ac = 0

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kx² + 6x + 1 = 0

D = 36 - 4k = 0 ⇒ k = 9