SOLUTION: If 9n^2-30n+c is a perfect square for all integers n, what is the value of c?

SOLUTION: If 9n^2-30n+c is a perfect square for all integers n, what is the value of c?

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Question 842989: If 9n^2-30n+c is a perfect square for all integers n, what is the value of c?
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
perfect square

Compare the terms and variables in the corresponding positions, especially the terms of n.

Using very little or no formal analysis, you expect 30=6k meaning that k=5.

CHECK:
Good.
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