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23-03-2021
Mathematics

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yeitzstephanie yeitzstephanie

23-03-2021

1) 5m^2 - 2mn + (12m + 9m) = 5m^2 - 2mn + 21m
2) 9x+ 16x - 10= 25x -10
3) (2x + 3x + 6x) + ( 5 - 2 + 20) = 11x + 23
4) - 2x^2 + ( 5x - x + 15x) + (7 + 10)= -2x^2 + 19x + 17

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