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anhyeuyen1552
2 năm trước
a) (3x ³ - 2x ²+x+2).(5x ²) b) (a ² x ³ - 5x+3x).(-2a ³x) c) (3x ²+5x - 2) (2x ² - 4x+3) d) (a mũ 4+a ³b+a ²b ²+ab ³+b mũ 4) (a-b)
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