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ACT® Math

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Moderate

Solving Quadratic Inequalities

ACTMAT-LKEWYJ

For which of the following intervals is $ 9-{ x }^{ 2 }<6$?

A

$ x<-\sqrt { 15 } \text{ or } x>\sqrt { 15 } $

B

$ x<-\sqrt { 3 } \text{ or } x>\sqrt { 3 } $

C

$ -\sqrt { 9 }< x <\sqrt { 9 }$

D

$ -\sqrt { 3 }< x <\sqrt { 3 }$

E

$ -\sqrt { 15 }< x < \sqrt { 15 }$