They are

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- Apr 2nd 2012, 09:14 PM #1

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## 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, 09:35 PM #2

- Apr 2nd 2012, 09:43 PM #3

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- Apr 2nd 2012, 09:47 PM #4

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