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Solve the following inequalities: x^2+5x+12 > 6Show step by step process to explain...

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spock12 | Student, Undergraduate | (Level 2) eNoter

Posted May 16, 2012 at 6:52 AM via web

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Solve the following inequalities: x^2+5x+12 > 6

Show step by step process to explain the solution and answer

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thilina-g | College Teacher | (Level 1) Educator

Posted May 16, 2012 at 7:20 AM (Answer #1)

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`(x^2+5x+12)gt6`

Rearranging,

`x^2+5x+6gt0`

Changing into factors,

`(x+2)(x+3)gt0`

For this to be positive, both of the factors are negative or both of the factors are positive.

Therefore, one solution is,

`x+2lt0 and x+3lt0`

`xlt-2` and `xlt-3`


The common solution for this is `x lt-3` .


The other solution,

`x+2gt0` and `x+3gt0`

`xgt-2` and `xgt-3` .

The common solution is `xgt-2` .

 

Therefore, the solutions for the given inequaility are x <-3 or x>-2.

 

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