College Algebra Formulas and Rules - Lamar State …

1 Standard form (Linear) + = Point- slope formula = ( ) slope -Intercept form = + slope formula = Distance formula = ( ) +( ) Midpoint formula + , + General form (Quadratic) + + = ( )= + + ; ( ) Standard (Vertex) form ( )= ( ) + Quadratic formula = Vertex of a Parabola ( , )= , , Equation of a Circle = ( ) + ( ) = ( ) + ( ) r = radius, (h, k) = center of circle Difference of Squares ( )=( )( + ) Sum of Squares + ; Perfect Square Trinomial + + =( + ) + =( ) Difference of Cubes =( ) + + Sum of Cubes + =( + ) + Tip: Use to remember the signs in the Diff. and Sum of Cubes Formulas Same, Opposite, Always Positive. = = . = = ( ) = ( ) = = 0 = + = / ; n = = / + = = = ; = log = =log = = ; =.

2 = = = = = Tip: Use the change of base formula to convert to base 10 (log) or base e (ln). Some calculators handle only these bases. = + = LSC-O Learning Center (409) 882-3373 Ron E. Lewis Library building, rm. 113 Find this and other math resources on the LSC-O Learning Center Math Tutorials page. EP, 7/2013