SOLUTION: What is the y value of y = x^2 - 4x when the value of x is -1 negative 1 or the value of is ix 1 positive 1 are they the same? why or why not? can you show how yo

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equation Customizable Word Problems -> SOLUTION: What is the y value of y = x^2 - 4x when the value of x is -1 negative 1 or the value of is ix 1 positive 1 are they the same? why or why not? can you show how yo      Log On


   

Question 428188: What is the y value of
y = x^2 - 4x
when the value of x is -1 negative 1
or the value of is ix 1 positive 1
are they the same? why or why not?
can you show how you solved it?
Thanks so much.
Answer by rfer(16322) About Me  (Show Source):
You can put this solution on YOUR website!
y=x^2-4x
y=-1^2-4*-1
y=1+4
y=5
-----------
y=1^2-4*1
y=1-4
y=-3