Determine between which consecutive integers the real zeros of f(x)=x^2-4x-2 are located.
a. between 3&4 and -1&0
b.between 4&5 and 0&1
c. between 4&5 and -1&0
d.between 3&4 and 0&1

Question

Determine between which consecutive integers the real zeros of f(x)=x^2-4x-2 are located.
a. between 3&4 and -1&0
b.between 4&5 and 0&1
c. between 4&5 and -1&0
d.between 3&4 and 0&1

tkhunny · Answer

Have you considered evaluating f(x) at x = -1, 0, 1, 3, 4, and 5 so that you will know?

Have you considered solving f(x) = 0 with the Quadratic Formula and finding the exact values?

anonymous · Answer

yes but I don't think I got it right.

tkhunny · Answer

You don't even care if you THINK you got it right.  You should care about the results you obtained and if you interpreted these results effectively.

What did you get when you evaluated the function at those points?
What did you get when you applied the Quadratic Formula?