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alatso
2 năm trước
Rút gọn và tính giá trị các biểu thức sau: a) A = (x + 5)^2 - (x- 3)^2 tại x = 10 c) E = (x - 1)^3 + (x – 2)^3 tại x = 3 b) B = (x + 1)^2 –(x- 1)^2 tại x = -5 d) F = (x - 1)^3 – (x- 2)^3 tại x = -2 Ai làm nhanh đúng 5 sao
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