2. 外语
  3. If k≠0，and k-=x/k，then x=

If k≠0，and k-=x/k，then x=

admin2022-10-18  2
问题 If k≠0，and k-=x/k，then x=
选项 A、-3-k2
B、k2-3
C、3k2-3
D、k-3-2k2
E、k-3+2k2
答案C
解析 Multiplying both sides of the equation by k gives k2-(3-2k2) = x or x = 3k2-3.
The correct answer is C.
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