In problems like this, sometimes you can just guess them.  
But if you can't, then do it this way:

x = first even integer
x+2 = second even integer

x(x+2) = 120

x² + 2x = 120

x² + 2x - 120 = 0



a=1, b=2, c=-120









Using the +







So one solution is

x = 10 = first even integer
x+2 = 10+2 = 12 = second even integer

Using the -







So another solution is

x = -12 = first even integer
x+2 = -12+2 = -10 = second even integer

Edwin

Numbers:  

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