# Pre cal

posted by .

I need help finding the zeros of a function algebraically. And here is one of them f(x)= x^3-4x^2-9x+36

• Pre cal -

try writing as:
(x^3 - 9x) -(4x^2-36) =0

x(x^2-9) -4 (x^2-9)=0

(x^2-9)(x-4) = 0

(x-3)(x+3)(x-4) = 0

3 , -3 , 4

## Similar Questions

1. ### Pre-Cal.

Determine between which consecutive integers one or more real zeros of f(x)=3x^4+x^3-2x^2+4 are located?
2. ### pre-cal

How do I find the domain of the following function algebraically?
3. ### Pre Calc

7. The Sandusky Little League uses a baseball throwing machine to help train 10-year old players to catch high pop-ups. It throws the baseball straight up with an initial velocity of 48 ft/sec from a height of 3.5 ft. a. Find an equation …
4. ### pre cal

Determine algebraically whether the function is even, odd, or neither even nor odd. f as a function of x is equal to 14 times the cube root of x
5. ### pre cal

Write a polynomial function of minimum degree with real coefficients whose zeros include those listed. Write the polynomial in standard form. 3, -13, and 5 + 4i Urgently need help
6. ### Pre cal

1.Find the domain of the function algebraically y=3x-1/(x+3)(x-1) y=(1/x)+5/(x-3) 2.Find the range of the function y=10-x^2 y=(3+x^2)/(4-x^2) Please help me understand how to do them.
7. ### Math (Pre-Calculus)

Can someone help me with this? Thanks! Find the zeros of the function algebraically. f(x)=x^2-8x+15 ---------------- 10x
8. ### Pre-Calc

Find the zeros of the function algebraically. Show all work. f(x)=x^2-8x+15 ---------------- 10x
9. ### Pre-Calc

Find the zeros of the function algebraically. Show all work. f(x)=x^2-8x+15 ---------------- 10x
10. ### Pre-Calc Help!

I really need help with this question. Thanks! Find the zeros of the function algebraically. Be sure to show all work. f(x)=x^2-8x+15 --------------- 10x

More Similar Questions