Question

If αand β are the zeros of the polynomial x^2 + 7x + 7 , then find the value of : i)1/α + 1/β− 2αβ ii) α^−1 + β^−1 iii)α/β + β/α

Answer 1

Answer

Correct option is

A

4

15

f(x)=x

2

−x−4

α+β=1

αβ=−4

→

α

1

+

β

1

−αβ

=

αβ

α+β

−αβ

=

−4

1

−(−4)

=

4

−1

+4

=

1

mark as brainlist