###
(A-B)(A+B)

difference of two squares A^2-B^2

###
(A+B)^2

Perfect Square/Square of a Binomial A^2 + 2AB + B^2

###
(A-B)^2

Perfect Square/Square of a Binomial A^2 - 2AB + B^2

###
(A-B)(A^2 + AB + B^2)

differences of cubes A^3 - B^3

###
(A+B)(A^2 - AB + B^2)

sum of cubes A^3 + B^3

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y1 - y2/x1 - x2

formula for slope of a line

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y-y1=m(x-x1)

point slope form

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(x-h)^2 + (y-k)^2 = r^2

formula for a circle

###
square root of: (x2 -x1)^2 + (y2 - y1)^2

distance formula

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