The expression \[y=a{{x}^{2}}+bx+c\] has always the same sign as c if

1.	The expression \[y=a{{x}^{2}}+bx+c\] has always the same sign as c if
A.	\[4ac<{{b}^{2}}\]
B.	\[4ac>{{b}^{2}}\]
C.	\[ac<{{b}^{2}}\]
D.	\[ac>{{b}^{2}}\]
Answer» C. \[ac<{{b}^{2}}\]

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The expression \[y=a{{x}^{2}}+bx+c\] has always the same sign as c if

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