Question

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

Answer 1

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

$=> \frac{9}{10} = k$

Answer 2

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