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Phương trình (m + 2)x2 – 2mx + 1 = 0 là phương trình bậc hai khi: A. m ≠ 1. B. m ≠ -2. C. m ≠ 0. D. mọi giá trị của m.
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Phương trình (m + 2)x2 – 2mx + 1 = 0 là phương trình bậc hai khi:

A. m ≠ 1. B. m ≠ -2. C. m ≠ 0. D. mọi giá trị của m.

User Anargund
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1 Answer

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B::: m ≠ -2.............

User Zacqary
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