Question

If a and B are zeroes of x square + 5x + 5, Find the value of a power -1 + B power -1 ​

Answer 1

We know:

A + B = -b/a

A*B = c/a

From these:

A + B = -5

A*B = 5

We require 1/A + 1/B

Take lcm (AB)

B/AB + A/AB

=> ( A+ B ) / AB

=> -5/5 => -1

Hope it helped