Divide all terms by their GCF which is 20 and so w^2+5w+2 which when factored is (m+4.5616)(m+0.4384) to four decimal places
A more accurate answer can be found by using the quadratic equation formula
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10a * (a + 2)
5x(7xy + 6x + 8)
8878
Factor completely and check mentally 10a^2+20a
-5x(3x - 1)