# Math (Pre-Calculus)

posted by Ben

Can someone help me with this? Thanks!

Find the zeros of the function algebraically. f(x)=x^2-8x+15
----------------
10x

1. bobpursley

xeroes will be when the numberator is zero.

x^2-8x+15=0
(x-5)(x-3)=0
xeroes at 3,and 5

2. Ben

@bobpursley

How did you get 3 and 5?

## Similar Questions

1. ### 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 …
2. ### Pre cal

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

For the following function f(x)=2x^4-6x^2+2x-1. Find the maximum number of real zeros and Use Descartes's rule of signs to determine how many positive and how many negative zeros the function has. You do not need to find the zeros.
4. ### pre calculus

use the rational zeros theorem to find all the real zeros of the polynomial function. use the zeros to factor f over the real numbers: f(x)=x^4+2x^3-7x^2-8x+12 I am totally lost, please help?
5. ### Pre-Calculus

Find all the real zeros of the polynomial. Use the quadratic formula if necessary. 4x^3 − 10x^2 + 9
6. ### Pre-Calc

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

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

20.) How do I find the zeros of the function algebraically?
10. ### Pre-Calculus

Find all zeros of the function f(x) = (x - 4)(x + 3)(x + (4 + 3i))(x - (4 - 3i)). Is it x = 4, -3, -4 - 3i, and 4 - 3i ?

More Similar Questions