Question

If a and b are the zeros of the quadratic polynomial f(x)= x2 -5x+4, find the value of
1/a + 1/b- 2a b

Answer 1

Answer:

-8.75

Step-by-step explanation:

Solve for x first

x2-5x+4 = x2 - 4x - x + 4 = (x-1)(x-4)

So a,b = 1,4, let's say a= 1, b= 4 (answer will be same either way)

so 1/1 + 1/4 - 2(1)(4) = 1+0.25-8 = -8.75

Hope that helps!!!