Question

Q) 2 em
2 (
2. The value of k for which the quadrabe equations
20² + Kx +2=0 has equal roots is -​

Answer 1

Answer:

given, 20² + Kx +2=0 has equal roots

we know if roots are equal then D = 0

=> b² - 4ac = 0

=> k² - 4×400×2 = 0

=> k² = 3200

=> k = ± 40√2