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(a+b) 2 = a 2 + 2ab + b 2 (a+b)(c+d) = ac + ad + bc + bd a 2 - b 2 = (a+b)(a-b) (Difference of squares) a 3 x 2 + (a+b)x + AB = (x + a)(x + b) if ax 2 + bx + c = 0 then x = ( -b |
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b 3 = (a 
ab + b 2) (Sum and Difference of Cubes)
(b
2 - 4ac) ) / 2a (Quadratic Formula)
