Question

How do you verify the zeros of a function? Does it involve a graph?

Answer 1

set function equal to cero and solve for x

Answer 2

Evaluate the function at the zeros. You should get 0 as the value. For example, the function x^2 + 3x + 2 has zeros at x = -1, x = -2. Testing,

(-1)^2 + 3(-1) + 2 = 1 - 3 + 2 = 0
(-2)^2 + 3(-2) + 2 = 4 - 6 + 2 = 0

Answer 3

If you have a good graph, you can see approximately where the zeros are, as they will be points where the curve either touches or crosses the x-axis.