SOLUTION: Find the vertex, the y intercept, and the x intercept and graph the function y=x2-2x-8 (it's x squared)

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Find the vertex, the y intercept, and the x intercept and graph the function y=x2-2x-8 (it's x squared)      Log On


   

Question 842022: Find the vertex, the y intercept, and the x intercept and graph the function
y=x2-2x-8 (it's x squared)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
y=x%5E2-2x-8
y=%28x%5E2-2x%2B1%29-8-1
y%2B9=%28x-1%29%5E2
Vertex: (1,-9)
x-intercept : 0%2B9=%28x-1%29%5E2
x-1=0+%2B-+3
x=-2 and x=4
y-intercept : y=-8
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graph%28300%2C300%2C-8%2C10%2C-14%2C4%2Cx%5E2-2x-8%29