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Find the value of k for …

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Find the value of k for the following quadratic equation so that it should have equal roots :-kx²+6x+1=0

Posted by Mandeep Kaur 4 years, 7 months ago

CBSE > Class 10 > Mathematics

3 answers

Ambika Kumari 4 years, 7 months ago

a=k, b=6, c=1 Formula for equal roots, b²-4ac 6²-4×k×1 36-4k=0 36=4k K=9... ???

Bipin Bihari 4 years, 7 months ago

Kx²+6x+1=0 a=K, b=6, c=1 D=b²-4ac =36-4×1×k =36-4k=0 =36=4k =36/4=k =9=k

A K47 4 years, 7 months ago

if roots are equal then, then b²-4ac=0, putting values we get 6²-4k=0. So, k = 9.

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