Nonlinear Equations in One Variable and Systems of Equations

SAT Math· difficulty 3/5

Which equation has two distinct rational roots?

A
$x^2 - 5x + 6 = 0$
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B
$x^2 + 2x + 1 = 0$
C
$x^2 + x + 1 = 0$
D
$x^2 - 2x - 1 = 0$

Explanation

x^2 - 5x + 6 = 0

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