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Find the intercepts and use them to graph the equation y=8x^2-8

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stevejackson | (Level 1) eNoter

Posted September 12, 2013 at 9:26 AM via web

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Find the intercepts and use them to graph the equation y=8x^2-8

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jeew-m | College Teacher | (Level 1) Educator Emeritus

Posted September 12, 2013 at 9:37 AM (Answer #1)

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`y = 8x^2-8`

This graph is at x-y plane. So the curve will have two intercepts where is intercept x-axis and y-axis.

x-intercept can be obtained when y = 0

`y = 8x^2-8`

`0 = 8(x^2-1)`

`x^2 = 1`

`x = +-1`

 

So we have x-intercepts at two locations,at x = 1 and x = -1.

 

y-intercept can be obtained when x = 0

`y = 8x^2-8`

`y = -8`

 

So we have y intercept at y = -8.

 

For further clarification please refer the graph.

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