Question

if alfa ,beta are zeros of the polynomial 2x²+7x+5 find the value of alfa+beta+alfa×beta​

Answer 1

Answer:

alfa+beta+alfa×beta​         =   -1

Step-by-step explanation:

$2x^{2} +7x+5$

a = 2, b = 7, c = 5

$\alpha + \beta$ =  -b/a =  -7/2

$\alpha *\beta$ = c/a =  5/2

so alfa+beta+alfa×beta​      =  -7/2 + 5/2   =  (-7+5)/2  = -2/2  = -1