Question

help me fast to solve

If alpha and beta are the two zeroes of the polynomial x2+5x+7, then find the value of 1/alpha+1/beta + alpha beta ​

Answer 1

Answer:

$\alpha + \beta = - \frac{5}{1} = - 5 \\ \alpha \beta = \frac{7}{1} = 7 \\ \frac{1}{ \alpha } + \frac{1}{ \beta } + \alpha \beta \\ = \frac{ \alpha + \beta }{ \alpha \beta } + 7 \\ = \frac{ - 5}{7} + 7 \\ = \frac{ - 5 + 49}{7} \\ = \frac{44}{7}$

44/7 is the right answer.Hope understand

Answer 2

Answer:

SO,

1/alpha +1/beta = -5/6

HOPE IT HELPS...