ax + bx = (a + b)x
ax − bx = (a − b)x
Multiplying Monomials
(ax)(bx) = (ab)x^2
Multiplying Binomials—FOIL
Classic Factorables
Factor common to all terms:
ax + ay = a(x + y)Difference of squares:
a^2 − b^2 = (a − b)(a + b)Square of binomial:
(a + b)(c + d) =?
First = ac
Outer = ad
Inner = bc
Last = bd
Product = ac + ad + bc + bd