Question

answer please class 10​

Answer 1

$\frac{1}{ \alpha } + \frac{1}{ \beta } = \frac{ \alpha + \beta }{ \alpha \beta }$

$\\\alpha + \beta = \frac{ - coefficient \: of \: x}{coefficient \: of \: {x}^{2} } \\ \alpha + \beta = \frac{7}{5} \\ \alpha \beta = \frac{constant}{coefficient \: of \: {x}^{2} } \\ \alpha \beta = \frac{1}{5} \\ </p><p></p><p></p><p></p><p>\\\\ \frac{1 }{ \alpha } + \frac{1}{ \beta } = \frac{7}{5} \div \frac{1}{5} = 7$