Question

if a and b are the zeroes of the quadratic polynomial f(x)=x^2-x-4 find the value of 1/a+1/b-a×b​

Answer 1

If a and b are zeros of x2+x−2 , a+b must be −1 and ab=−2. 1a −1b. = b−aab. = √(a+b)2−4abab.