Question

which one is correct ​

Answer 1

Answer:

-5 is the answer.

Step-by-step explanation:

Let alpha be A and beta be B.

A + B = -b/a = -5/5 = -1

AB = c/a = 1/5

A^-1 + B^-1 = 1/A + 1/B = A+B/AB = -1/(1/5) = -5

Answer 2

Answer:

$\frac{1}{a} + \frac{1}{b} \\ = \frac{a + b}{a \times b} \\ = \frac{ \frac{ - 5}{5} }{ \frac{1}{5} } \\ = - 5$

sum of roots = -b/a

product of roots = c/a

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