College algebra // FSU // Hollingsworth blackwelder notes
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Distance formula
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?(x2-x1)²+(y2-y1)²
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Quadratic formula
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(-b±?b²-4ac)/2a
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Standard form
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ax²+bx+c
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How do you rationalize the denominator with a radical?
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lol
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How do you find x intercepts?
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set y or f(x) = 0
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How do you find y intercepts?
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set x=0
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slope formula
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y=mx+b
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point slope formula
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(y-y1)=m(x-x1)
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average rate of change or AROT
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f(x)-f(c) all over / x-c
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midpoint formula
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(x2+x1 all over/ 2) , (y2+y1 all over/2)
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If two lines are parallel they have...
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the same slope
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discriminant
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b²-4ac
