Question

x2-ax+4=0. alpha +bita =4​

Answer 1

       $\underline{\bold{Solution:}}$

       $\text{It is given that }\alpha \text{ and }\beta \text{ are roots of }x^{2} -ax + 4 = 0$

       $\text{It is also given that }\alpha + \beta = 4$

       $\text{Applying the relationship between roots and coefficients}$

$\implies \text{Sum of roots} = \dfrac{-y}{z}$

       $\text{In our case, }y = -a \text{ and }z = 1$

$\implies \alpha + \beta = \dfrac{-(-a)}{1}$

$\implies \boxed{4 = a}$