Algebra Functions
posted by natalie .
I cannot for the life of me remember how to do this Find the vertex of the graphs of the functions:
Function #1: y=(x4)(x+2)
AND
Function #2: y=2x^24x+1
Can someone help me get it PLz!
OK  to find the vertex of these functions you must have them in quadratic form where the first coefficient in front of the x^2 is a, the linear term is b, and the constant is c. You then do b/2a. For the first one, you must FOIL it out to get x^22x8. b is 2 and a is 1. So, the xcoordinate of the vertex is (2)/2(1) which is 1. Then plug it back in for x so y=(14)(1+2), y=9. The vertex is (1,9). Do the same for the second function. You should end up with (1,1); if you don't get this please post again.
Respond to this Question
Similar Questions

precal: graphs of functions fill in the blank
To find the domain of a function from its graph... To find the range of a function from its graph... To approximate the relative minimum or maximum of a function using a graphing utility,... Let a(,f(a)) and (b,f(b)) be two points … 
Math
What are the similarities and differences between functions and linear equations? 
Math
What are the similarities and differences between functions and linear equations? 
algebra
Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, and explain the reasons for your classifications. Compare … 
algbra
Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, and explain the reasons for your classifications. Compare … 
algebra
Evaluate each of the functions below at x = 1, 2, 4, 8, and 16. Plot the graph of each function. Classify each as linear, quadratic, polynomial, exponential, or logarithmic, and explain the reasons for your classifications. Compare … 
Algebra
Graph and label the following two functions: f(x)=(x^2+7x+12)/(x+4) g(x)=(x^2+3x+9)/(x1) 1. Describe the domain and range for each of these functions. 2. Determine the equation(s) of any asymptotes found in the graphs of these functions, … 
Precalculus
The application of one function followed by the application of a second function to the result of the first as in F^1(f(x)) is called composition of functions. The two functions need not be inverse of each other. In a diagram, the … 
math
The application of one function followed by the application of a second function to the result of the first as in F^1(f(x)) is called composition of functions. The two functions need not be inverse of each other. In a diagram, the … 
algebra functions
construct two composite functions, Evaluate each composite function for x=2. i do not fully understand functions yet can someone explain and show me what to do step by step f(x)=x+1 g(x)=x2