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Looking at factor pairs of 40: {1*40, 2*20, 4*10, 5*8}, 4 & 10 should work:
To get -40 one of them must be negative: -10*4 = -40, and -10 + 4 = -6
-274
-46
-58
6*1
-6 and -1.
6 and 1
-10 and -4
-22
26
24
6 and -1