If the vertex of the parabola \( y=x^{2}-8 x+c \) lies on \( X \)-axis, then the value of \( c \... VIDEO
If the vertex of the parabola \( y=x^{2}-8 x+c \) lies on \( X \)-axis, then the value of \( c \) is
(a) 4
(b) \( -4 \)
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(c) 16
(d) \( -16 \)
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