Question

if A and B are zeroes of
2 y 2 + y + 5. write the value
of a+ B+ab ?​

Answer 1

Step-by-step explanation:

2y² + 7y + 5 = 0

Here a = 2 , b = 7 , c = 5

α,β are 2 zeroes

So sum of the zeroes = α + β = - b/ca= -7/2

Product of zeroes = αβ = c/a = 5/2

Now just put the values

α + β + αβ = ( α + β) + αβ

= -7/2 + 5/2

= -2/2 = -1

So required answer is -1

Hope This Helps You!

Answer 2

Step-by-step explanation:

Given polynomial 2y2+7y+5

Here a=2,b=7,c=5

α,β are two zeroes

So, sum of the zeroes =α+β=−ab

=2−7

Product of the zeroes =αβ=ac

=25

Now just put the values

α+β+αβ=(α+β)+αβ

=2−7+25

=2−7+5

=2−2

=−1

∴ So, the required answer is −1.