4n-m 3m+n--------- --------- 20mn² - 15m²n 8 ---- x-2 + x² + 2x + 4 x-4y x+4y --------- ----------- 6x(x-y) - 6x(x+y) b+3 b-1 ------ ------- 9b-27 - b² - 3b
4n-m 3m+n 12mn-3m^2-12mn-4n^2 -3m^2-4n^2 --------- ---------= ---------------------------------- =------------------ 20mn² - 15m²n 60m^2n^2 60m^2n^2 8 8+x^3-2x^2+2x^2-4x+4x-8 x^3 ---- + x² + 2x + 4=------------------------------------------------=-------- x-2 x-2 x-2 b+3 b-1 b+3 b-1 b^2+3b-9b+9 (b-3)^2 b-3 ------ ------- =-------------- - ---------------= ---------------------=----------------------=--------- 9b-27 - b² - 3b 9(b-3) b(b-3) 9b(b-3) 9b(b-3) 9b
