The factor pair is (2,10)
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How about: 4*5 = 20 as one example
2x10=2x10to the first power
it is 1 and 20, 10 and 2, 5 and 4
Substitute the value for y given by the second equation into the first equation to result in 3x - 15 = x2 - x -20. Subtract (3x - 15) from both sides and exchange sides to yield x2 - 4x - 5 = 0. This can be factored into (x - 5)(x + 1) = 0, which is true when x equals either 5 or -1. If x = 5, y = 0 and if x = -1, then y = -18. Therefore, either 5,0 or -1,-18 is an ordered pair solution to the given equation system.
Twenty Five, 20+5, and (2x10)+(5x1).