They are

Results 1 to 4 of 4

- Apr 2nd 2012, 10:14 PM #1

- Joined
- Mar 2012
- From
- LA
- Posts
- 68

## Are These Right?

Nonlinear inequalities in one variable. Quadratic inequalities, write the solution in interval notation.

(X-5)(x+2)>(or equal to)0

(X-5)((X+2)=0

X-5=0 or X+2=0

+5 or -2

(-∞,-2]U[5,∞

x^2-4x-12<0

(x-6)(x+2)<0

+6 -2 <0

so the set would be (-2,6)

I do not mind about the steps, I just want to know if these are the correct interval notations.

- Apr 2nd 2012, 10:35 PM #2

- Apr 2nd 2012, 10:43 PM #3

- Joined
- Mar 2012
- From
- Sheffield England
- Posts
- 440
- Thanks
- 76

- Apr 2nd 2012, 10:47 PM #4

- Joined
- Mar 2012
- From
- LA
- Posts
- 68