Example

Factoring 42m218m35m+1542m^2 - 18m - 35m + 15

Factor the polynomial 42m218m35m+1542m^2 - 18m - 35m + 15 using the grouping method. Since there is no common factor for all four terms, divide the terms into two pairs: (42m218m)(42m^2 - 18m) and (35m+15)(-35m + 15). Factor the GCF from the first pair, which is 6m6m, resulting in 6m(7m3)6m(7m - 3). For the second pair, factor out a negative GCF of 5-5 to reverse the signs and obtain a matching binomial: 5(7m3)-5(7m - 3). The expression is now 6m(7m3)5(7m3)6m(7m - 3) - 5(7m - 3). Since both groups share the binomial (7m3)(7m - 3), factor it out to get the completely factored expression: (7m3)(6m5)(7m - 3)(6m - 5). Check the result by multiplying the factors.

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Updated 2026-04-29

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