Question

A polynomial function has roots – 6 and 2. Which of the following could represent this function?

f(x) = (x + 6)(x + 2)

f(x) = (x – 6)(x – 2)

f(x) = (x – 6)(x + 2)

f(x) = (x + 6)(x – 2)

Answer 1

the answer is 4

Explanation:

just did it on edge.

your welcome

Answer 2

f(x) = (x + 6)(x – 2)

Explanation:

The roots of a polynomial are the solutions to its factors. This means you can set the factors equal to 0 and the roots are the solution. Working backwards, if the roots are x = -6 and x = 2 then they must have resulted from factors x + 6 and x - 2. This is true since x + 6 = 0 has solution x = -6. And x-2 = 0 has solution x = 2.

So the polynomial has factors (x+6)(x-2). The solution is f(x) = (x + 6)(x – 2).