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Where is the graph above the x axis?
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First
Find factors of 2 and 3 which can be subtracted to yield -5
Factors of 2: 1, 2
Factors of 3: 1, 3
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Adding -6 and 1 yields -5
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2x+1=0
2x = -1
AND
x-3=0
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The line crosses at x = and 3.
Either below , between and 3, or above 3,
the graph is above the x axis.
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Being a positive quadratic, where the parabola forms a "smile,"
it is above the x axis where AND
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Between and 3, the parabola is below the x axis
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