Question

If a and B are the zeroes of the polynomialp(x) = 2x^2 + 11x + 5, find the values of :
(i) a^2 +b^2
(ii)1/a+1/b-2ab​

Answer 1

Sum of zeroes = a+ b= -b / a =-11/2

Product of zeroes = ab = c/a = 5/2

i/) a^2 + b^2

= (a+b)^2 - 2ab

=(-11/2)^2 - 2*5/2

=121/4-10/2

= 121/4-20/4

= 101/4

Mark me and get the second part