Question

solve inequality (x-1)|x+1| Cos(x)>0​

Answer 1

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Algebra

 

Solve for x (x+1)/(x-1)>0

x+1x−1>0x+1x-1>0

Find all the values where the expression switches from negative to positive by setting each factor equal to 00and solving.

x+1=0x+1=0

x−1=0x-1=0

Subtract 11 from both sides of the equation.

x=−1x=-1

Add 11 to both sides of the equation.

x=1