| formula | name or description |
| ab + ac = a(b + c) | common factor; distributive law; factoring by grouping |
| a2 - b2 = (a - b)(a + b) | difference of 2 squares |
| a2 + 2ab + b2 = (a + b)2 | perfect square trinomial |
| a3 - b3 = (a - b)(a2 + ab + b2) | difference of 2 cubes |
| a3 + b3 = (a + b)(a2 - ab + b2) | sum of 2 cubes |
| ax2 + bx + c = (dx + e)(fx + g) | general trinomial factoring |
| Practice using these formulas ?? |
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