Formulas not in log-book

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6 Terms

1
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Binomial square formula

(a+b)²=a²+2ab+b²

2
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Vieta’s formula

x²-(a+b)x+ab=0

3
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Difference of 2 cubes

a³+b³=(a-b)(a²+ab+b²)

4
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Completing the square

a(x²+(b/a)x)+c

5
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Linear sequence formula

Tn=a+(n-1)d

a=first term

d=common difference

6
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Quadratic sequence formula

an²+bn+c

a=2nd difference divided by 2