Question

solve this as much as fast as u can
plz..

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Answer 1

Answer:

-295/12

Step-by-step explanation:

$x^{2} +7x=12$

$so, \alpha \beta=-b/a\\=-7\\  \alpha+\beta=c/a\\=12\\now,\frac{1}{\alpha } +\frac{1}{\beta } -2\alpha \beta \\\frac{\alpha +\beta }{\alpha \beta } -2\alpha \beta$

inserting values of alpha*beta and alpha+beta,

$\frac{-7}{12} -2*12\\\frac{-7-288}{12} \\\frac{-295}{12}$

check if unsure