Math, asked by nishant1322, 1 year ago

Find k if 2k square +6x+5 has equal roots

Answers

Answered by abhi569
10
Your question needs a correction :

Correct equation : 2kx² + 6x + 5






Discriminant = b² - 4ac


For equal roots, discriminant = 0



Hence,


=> (6)² - 4(5)(2k) = 0

=> 36 - 40k =0

=> 36 = 40 k

=> 9 = 10 k

 =>  \frac{9}{10}   = k
Answered by zarvis
2

it \: given \: that \: roots \: are \: equal \\ so \: discriminant \: will \: be \: zero \\ so \:  {b  }^{2}  - 4ac = 0 \\ putting \ \: given \: value \\  {6 }^{2}  - 4 \times 2 \times 5 k  = 0\\ 36 - 40k = 0 \\  \\ k  =  \frac{36}{40}   \:  \\ hope \: it \: will \: help \: you
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