Question

8. If a and B are the zeroes of the polynomial 2x + 5x + 1, find the value of a + B + (axb)
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Answer 1

Answer:

hyyyyyyyyy good evening

Step-by-step explanation:

Correct option is

A

-2

For a quadratic equation, ax

2

+bx+c=0,

The sum of the roots=

a

−b

and product of the roots is

a

c

Here sum of roots= α+β=

2

−5

Product of roots=αβ=

2

1

Therefore,α+β+αβ=

2

−5

+

2

1

⇒ α+β+αβ=−2

Therefore,Option A is correct.

Answer 2

Answer:

answer to this question is -2

Step-by-step explanation:

first of all this question has to be like this: 2x^2+5x+1

sum of zeroes= - coefficient of x/ coefficient of x^2

= -5/2

now, product of zeroes= constant term/ coefficient of x^2

= 1/2

so a+b+(a*b)

=-5/2+1/2

=-4/2=-2