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23-05-2014
Mathematics

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Which value of c makes y^2+8y+c a perfect square
A. 4 B.16 C.64 D.8

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23-05-2014

[tex]y^2+8y+c \\ \\ c=(\frac{b}{2})^2=(\frac{8}{2})^2=4^2 = 16 \\ \\y^2+8y+16 = (y+4)^2 \\ \\Answer : \ B. \ \ 16[/tex]

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