RUMUS OPERASI ALJABAR

q  Penjumlahan

o   ax + bx      = (a + b) x

o   ax – bx      = (a – b) x

q  Perkalian

o   k(a + b)                  = ka + kb

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

o   (a + b)²                  = (a + b)(a + b)

= a² + 2.ab + b²

o   (a – b)²                   = (a – b)(a – b )

= a² – 2.ab + b²

o   (a + b)(a – b)         = a² – b²

q  Pemfaktoran

o   ax + ay      = a(x + y)

o   ax – ay       = a(x – y)

o   a² – b²        = (a + b)(a – b)

o   x² + bx + c             = (x + p)(x + q)

Cat:     p + q = b

            P . q  = c

o   a x² + bx + c          =  

                    (ax + p)(ax + q) / a

Cat:     p + q = b

            P . q  = ac