Question

sum of the roots of x2-4x+5=0 is_____​

Answer 1

$4.$

Step-by-step explanation:

${x}^{2} - 4x + 5 = 0$

$Let \: \alpha \: and \: \beta \: are \: te \: zeroes \: of \: the \: polynomial$

$\alpha = alpha \: and \: \beta = beta$

Let a = 1 , b = -4 and c = 5.

Sum of the zeroes =

$\alpha + \beta \: = \frac{ - b}{a}$

$= \frac{ - ( - 4)}{1}$

$= 4.$