Question

If α and β are the roots of the polynomial

2 + 7 − 21, then find the value of α+β.​

Answer 1

Answer:

$\frac{-7}{2}$

Step-by-step explanation:

If equation is 2x² + 7x - 21

a = 2

b = 7

c = -21

$\alpha + \beta$ = -b/a

         = $\frac{-7}{2}$

$\alpha + \beta$ is = $\frac{-7}{2}$

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Answer 2

Answer:

-7/2

Step-by-step explanation:

2x²+7x-21

sum of the zeroes ,

alpha + beta = -b/a

= - coefficient of x / coefficient of x²

= -7/2