Question

please give me proper solution plzzzzzzzzzzzzzzzzzzzzzzzzzzzz​

Answer 1

Answer:

-1

Step-by-step explanation:

2x²+7x+5=0

therefore

sum of roots a+b= -7/2

product ab = 5/2

a+b+ab= -2/2

= -1

Answer 2

Answer:

first of all they are not a and b ,they are alpha and beta , considering them , answer is "-1"

Step-by-step explanation:

know that

alpha + beta = -b/a

and similarly

(alpha)(beta) = c/a,

consider from equation a=2, b=7, c=5

alpha + beta+ (alpha)(beta) =( -7/2)+(5/2)

=(-2/2)

=(-1)