Toán Lớp 8: Chọn câu sai: A. 15×2 + 10xy = 5x(3x + 2y) . B. 35x(y – 8) – 14y(8 – y) = 7(5x + 2y)(y – 8). C. -x + 6x^2 – 12xy + 2 = (6xy + 1)(x – 2). D. x^3 – x^2 + x – 1= (x^2 + 1)(x – 1).
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Toán Lớp 8: Chọn câu sai: A. 15×2 + 10xy = 5x(3x + 2y) . B. 35x(y – 8) – 14y(8 – y) = 7(5x + 2y)(y – 8). C. -x + 6x^2 – 12xy + 2 = (6xy + 1)(x – 2). D. x^3 – x^2 + x – 1= (x^2 + 1)(x – 1).
Giải thik ra luôn!
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