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Matematika SMP Kelas VIII
1] 2m (4m - 3) - 3(m - 2n)
= 8m² - 6m - 3m + 6n
= 8m² - 9m + 6n
2] 7y + 3x (4y - x) - 5y (1 - x) + 5x²
= 7y + 12xy - 3x² - 5y + 5xy + 5x²
= 2x² +17xy + 2y