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Linh2002
2 năm trước
Bài 5: Rút gọn các biểu thức sau: a) 𝒙.(2𝑥^2−3)−𝑥^2.(5𝑥+1)+𝑥^2 b) 3𝑥.(𝑥−2)−5𝑥.(1−𝑥)−8.(𝑥^2−3) c) 𝐶=(3.𝑥^(𝑛+1)−2.𝑥^𝑛).4𝑥^2 d) 𝐷=2𝑥^𝑛.(3.𝑥^(𝑛+1)−1)−3.𝑥^(𝑛+1).(2.𝑥^𝑛−1)
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