anonymous
  • anonymous
Referring to the figure, use the graph to estimate the roots of the equation: y = x2 - 2x - 8
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
and the figure is?
anonymous
  • anonymous
Figure please
anonymous
  • anonymous
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anonymous
  • anonymous
oh not a parabola
anonymous
  • anonymous
without the graph I can factor and find the answer: x^2 - 2x - 8 (x-4)(x+2) x-4 = 0 x = 4 x+2 = 0 x = -2
anonymous
  • anonymous
roots: x = 4, x = -2
anonymous
  • anonymous
Can you explain the process to me please?
anonymous
  • anonymous
yes, from what the question is telling you to do: the roots are going to be the x-intercepts of the graph. therefore we just need to find the x-intercepts.
anonymous
  • anonymous
which on the graph are clearly -2 and 4, do you see that?
anonymous
  • anonymous
okay yes i see that
anonymous
  • anonymous
so those are the solutions or roots
anonymous
  • anonymous
Ohh okay thats so easy than thank you!!

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