September 2018 2 19 Report
Sederhanakanlah!
1) 3X² - 5X + 7 - 2X + 4X - 9 =
2) m² + 3mn = 2n² - m² + mn - 5n² =
3) X²y - X² + 3X²y - Xy² + 5X² + 3Xy² =

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