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1. ax + bx = (a+b) x... contoh : 5x + 7x = (5+7)x = 12x
2. ax - bx = (a-b) x... contoh : 5x - 7x = (5-7)x = -2x
perkalian suku
1. k(a+b) = ka + kb.... contoh = 7(2x+5) = 14x + 35 dan 7 (2x-5y) = 14 - 35y
2. (a+b)(c+d) = a(c+d) + b(c+d).... contoh = (x-2) (2x+1)
= x(2x+1) - 2(2x+1) = 2-3x-2
pengkuadratan suku dua
1. = (a+b) (a+b) = + 2ab +
2. = (a-b) (a-b) = - 2ab -
pemfaktoran
1. kx + ky = k(x+y)... untuk perkurangan sama saja rumusnya hanya diganti -
2. = (a+b) (a-b)
kuadrat sempurna
3. ... perkurangan juga sama
pecahan
penjumlahan dan pengurangan
a + b = a + b
c c c c
pengurangan juga sama carax
perkalian
a x c = ac
b d bd
pembagian
a : c = ad
b d bc