If alpha and beta are roots of x^2-x+2=0, then alpha+beta+alphabeta is – InterviewSolution

1.

If alpha and beta are roots of x^2-x+2=0, then alpha+beta+alphabeta is

Answer»

Step-by-step EXPLANATION:

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

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