Question

solve 12 questions. ​

Answer 1

Answer:

$\alpha - \beta = 1 \: \: \: - (i) \\ \\ \alpha + \beta = \frac{ - b}{a} = \frac{ - ( - 7)}{1} = 7 \\ \\ \alpha + \beta = 7 \: \: \: - (ii) \\ \\ add \: (i) \: and \: (ii) \\ \\ 2 \alpha = 8 \\ \\ \underline{ \boxed{ {\alpha = 4}}} \\ put \: \alpha = 4 \: in \: (ii) \\ \\ 4 + \beta = 7 \\ \\ \beta = 7 - 4 \\ \\ \underline{ \boxed{ \beta = 3}} \\ \\ {x}^{2} - 7x + k \\ \alpha×\beta =c/a =</p><p>3×4=k/ 1</p><p> =k= 12</p><p></p><p>mark \: it \: as \: brainliest$