Monday

April 21, 2014

April 21, 2014

Posted by **Amy~** on Tuesday, September 28, 2010 at 5:35pm.

3x^(2) - 2x -1 > or equal 0

I get x=1 , x=-1/3

would the solution set become

{x|1 < x < -1/3}

I wasn't sure about the sign, if it should be greater than or equal to .

- Math -
**Henry**, Tuesday, September 28, 2010 at 8:09pm3x^2 - 2x - 1 >= 0,

Factor using the A*C Method:

A * C = 3 * -1 = -3 = 1 * -3,

3x^2 + (x -3x) - 1 >= 0,

(3x^2 - 3x) + (x - 1) >= 0,

3x(x - 1) + (x - 1) >= 0,

(x - 1) (3x + 1) >= 0,

x - 1 >= 0,

x >= 1.

3x + 1 >= 0,

3x >= -1,

x >= -1/3.

Solution Set: x >= 1, and x >= -1/3.

This is not a compound inequality; therefore, your last step does

not apply.

**Related Questions**

inequality - (x-4)/(2x+4) is greater than or equal to 1. How do i express ...

algebra 1 - who is correct and why? chloe jonas 3<2x-5<7 3<2x-5<7 3&...

Algebra - I am having trouble with -4less than or equal to -3x-13 less than or ...

Rational Inequality with Absolute Value - Here's a question I'm having trouble ...

math - can some one solve this Ex 1: -2x+7>22 -2x+7-7>22-7 -2x>15 -2x...

Math - Please please help!!!!! Solve the inequality and write the solution set ...

Algebra 2(check) cont.. - 1)solve the inequality -3(r-11)+15>_9 my answer = r...

math - Um... i cant find anything about this in the textbook, help??!! 1. m - 7...

compound inequality - olve. State the solution set using interval notation and ...

Math inequalitites - Hi, I need some help with some inequalitites. Thanks!! Use ...