sat math equations

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5 Terms

1
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vertex form

f(x)= a(x-h)² +k

2
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point slope form

y-y1 = m(x- x1)

3
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completing the square

x² + bx = (x + b/2 )² - (b/2)²

4
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equation of a circle

(x-h)² + (y-k)² = r² radius = (h,k)

5
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discriminate

b² - 4ac

D>0, 2 real

D=0, 1 real

D<0, 2 complex