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 Suma y resta Producto por escalar Producto Inversa
 Monomials Polynomials Special products Equations Quadratic equations Radical expressions Systems of equations Sequences and series Inner product Exponential equations Matrices Determinants Inverse of a matrix Logarithmic equations Systems of 3 variables equations
 2-D Shapes Areas Pythagorean Theorem Distances
 Graphs Definition of slope Positive or negative slope Determine slope of a line EcuaciÃ³n de una recta Equation of a line (from graph) Quadratic function PosiciÃ³n relativa de dos rectas Asymptotes Limits Distancias Continuity and discontinuities
 Sine Cosine Tangent Cosecant Secant Cotangent Trigonometric identities Law of cosines Law of sines
 EcuaciÃ³n de una recta PosiciÃ³n relativa de dos rectas Distancias Angles in space Inner product

 Geometría Distancia de un punto a una recta La distancia del punto A=(x0,y0) a la recta r: ax+by+c=0 viene dada por: $\fs3\;d(A,r)\;=\;\frac{|ax_0+by_0+c|}{sqrt{a^2+b^2}}$ La distancia del punto A(4,1) a la recta r:2x-y+4=0 viene dada por: Calcula la distancia del punto A=(-6,-8) a la recta que pasa por los puntos P=(-4,-9) y Q=(8,0) d(A,r) =