0
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13 26
55
-28 and 15
23
1 x 39 3 x 13 That's basically it (as for whole numbers, decimals are another question)
A coefficient is a number that multiplies a variable.
13, 26, 39, 52, 65
13
-35
4 and 9
-57
-113
1 and 26 multiply to 26.