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  • Roma
  • Community Manager
2010-01-21T17:18:46+01:00
-5(-x+1) = 5x - 5
-3a(1/3-a) = - 3a/3-a = (-4a/3 - a) + (a/3 - a)
1/2(2a-4b+1) = a + (-2b) + ½
m(2m+3) = 20² + 3m
3p(2r+5p-1) = 6pr + 5p² - 3p