Dividing a polynomial into factors
| [[$ ab + ac = a(b + c) $]] | common factor |
| [[$ ac + ad + bc + bd = a(c + d) + b(c + d) = (a + b)(c + d) $]] | grouping |
| [[$ a^2+2ab+b^2 = (a+b)^2 $]] [[$ a^2-2ab+b^2 = (a-b)^2 $]] [[$ a^2-b^2 = (a-b)(a+b) $]] |
formulas |