Question

for an equation x2 +4x +k = 0 , if roots are real and equal what is the value of k?​

Answer 1

Answer:

Given, x² +4x +k = 0

Condition for real and equal roots, D = 0

=> b²- 4ac = 0

(4)² - 4(1)(k) = 0

16 - 4k = 0

=> 4k = 16

=> k = 4