Algebra help (factoring polynomials)? 7(x  4) + 28y(x  4) factor completely if possible, you can take x  4 out but I think its prime. Very confusing. 7(x  4) + 28y(x  4)
Look for common factors to take out of the two terms. The obvious being 7 and (x  4). If you divide both terms by 7(x  4), you're left with (1 + 4y) in parentheses. Therefore this equals 7(x  4)(1 + 4y) – Algebra House
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