Question

The discriminant of the quadratic equation,X2+4x+K=0 is​

Answer 1

$Given \: Quadratic \: equation: \\x^{2} + 4x + k = 0$

$Compare \: above \: equation \: with \\ax^{2} + bx + c = 0, we \:get$

$a = 1 , b = 4 \:and \: c =k$

$Discriminant (D) \\= b^{2} - 4ac \\= 4^{2} - 4 \times 1 \times k \\= 16 - 4k$

Therefore.,

$\red{ Discriminant (D) \:of \:the \: equation}\\\green { = 16 - 4k}$

•••♪