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27 :
complementary angle : 63
supplementary : 153
105 :
complementary : none cuz complementary angles add to 90
supplementary : 75
18 :
complementary - 72
supplementary - 162
complementary angles add up to 90 degrees and supplementary angles add up to 180
2 (x^3 - 2y^2 -5)
hope this helps
you are trying to factor as much out as possible from each
in this case, it is 2