问题
填空题
若x2+4kx+4是一个多项式的完全平方，则k=______．
答案
∵x2+4kx+4是一个多项式的完全平方，
∴4kx=±2×2•x，
∴k=±1．
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若x2+4kx+4是一个多项式的完全平方，则k=______．
∵x2+4kx+4是一个多项式的完全平方，
∴4kx=±2×2•x，
∴k=±1．
A．(A) Everyone wants to attend to this school, as it is a private institution.
B．(B) It is impossible for you to keep to your own in this boarding school.
C．(C) We all get along very well in this boarding school, as if of close friends.
D．(D) It is not important to step into other people’s affairs here at this school.