AM-173

Quadratic inequalities

A Math · Secondary 3 · Easy · Quadratic inequalities

Find the range of values of

x

for which

x^2-4x-5\ge0

.

$x\le-1$ or $x\ge5$
$-1\le x\le5$
$x<-1$ or $x>5$
$x\ge-1$ and $x\le5$

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