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Math·Advanced Math·Nonlinear equations in one variable and systems of equations in two variables

easy

For a certain quadratic equation of the form $a{x}^2+bx+c=0$, where a, b, and c are constants, the equation has two distinct real solutions. Which of the following must be true?

A

$b^2>4ac$

B

$b^2<4ac$

C

$b^2=4ac$

D

$ac<0$