Question 32049This question is from textbook College Algebra
: I emailed you last night but was having computer problems, so thought I would try again. I am having problems decifering the difference between: solve by factoring, solve by completing the square, and solve by using the quadratic equation.
1) Using the quadratic equation x squared-4x-5=0, solve by factoring, solve by completing the square, and solve by using the quadratic formula.
Question 2) I don't know how different letters can replace other letters: For the function y=x squared-4x-5, put the function in the form y=a(x-h)squared+k. What is the line of symmetry? Graph the function using the equation in the first part. Explain why it is not necessary to plot points to graph when using y=a(x-h)squared+k.
Do you know where I can find the squared key and square root key? This question is from textbook College Algebra
You can put this solution on YOUR website! y=x^2-4x-5
x=5 or x=-1
Completing the square:
Take the square root of both sides to get;
x-2=3 or x-2=-3
x=5 or x=-1
a=1, b=-4, c=-5
x=(10/2)=5 or x=(4-6)/2=-1
Change of Form:
Complete the square to get:
Axis of symmetry is x=2
For square rt type sqrt
For square use ^2