Solve the inequality x

^{2}+ 2x > 15.-
**A.**

x 5 -
**B.**

-5 -
**C.**

x 5 -
**D.**

x > 3 or x

##### Correct Answer: Option D

##### Explanation

x^{2} + 2x > 15

x^{2} + 2x – 15 > 0

(x^{2} + 5x) – (3x – 15) > 0

x(x + 5) – 3(x + 5) >0

(x – 3)(x + 5) > 0

therefore, x = 3 or -5

then x 3

i.e. x