ALGEBRA FORMULAS

(a+b)2 = a2 + 2ab + b2

(a+b)(c+d) = ac + ad + bc + bd

a2 - b2 = (a+b)(a-b) (Difference of squares)

a3 b3 = (a b)(a2 ab + b2) (Sum and Difference of Cubes)

x 2 + (a+b)x + ab = (x + a)(x + b)

if ax2 + bx + c = 0 then x = ( -b (b2 - 4ac) ) / 2a (Quadratic Formula)