Sunday

February 1, 2015

February 1, 2015

Posted by **m** on Thursday, September 8, 2011 at 4:58pm.

4x^3 is greater than or equal to 16x

and

4 is greater than or equal to 2x^3 + 8x

- algebra 2 -
**MathMate**, Sunday, September 11, 2011 at 9:41amYes, you can factor out

*numbers*which are positive as in equations.

4x>16 can be written as

x>4

(common factor 4 is positive.)

If the factor is negative, you can still factor it out,*but*you will need to reverse the sign of inequality.

-5x ≥ 40

x ≤ 40/(-5)

x ≤ -8

(common factor -5 is negative)

If the sign of the factor is unknown, then you'll have to make different cases:

ax > ab

x > b (if a>0)

x < b (if a<0)

x is undefined if a=0

**Answer this Question**

**Related Questions**

Factor - How do I factor these: 2x2 - 16x + 30 4x^2-9 x^2-5x 5x^2-26x+5 25x^2+4 ...

algebra - Solving inequalities and graphing: y<2x+4 -3x-2y greater than or ...

Solving inequalities - I have to solve the following inequalities: x^2 + y^2 is ...

Algebra - Use a graphing calculator or a computer to graph the system of ...

Math - find any stationary points of the function g(x) = (2x-3)square root of 5+...

algebra - I have trouble solving quadratic inequalities. I dont understand when ...

algebra 1 - how do you factor 16x^4 - 40x^2 + 9 I don't understand how the ...

algebra/ inequalities - Posted by lauren on Thursday, April 17, 2008 at 8:45pm ...

math - Suppose you need $2.40 in postage to mail a package to a friend. You have...

College Algebra - How do you solve this to graph the system of inequalities? x+...