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Question

Solve the following inequality:
1x21x2x+2

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Solution

1x21x2x+2

1x21x2x+20

=x(x+2)x(x2)(x+2)(x2)(x+2)x(x2)(x+2)2x(x2)(x+2)x(x2)

=x(x+2)(x2)(x+2)2x(x2)x(x2)(x+2)

=2x2+6x+4x(x2)(x+2)

2x2+6x+4x(x2)(x+2)0

2(x23x2)x(x2)(x+2)0

x23x2iszerofor:x=3+172,x=3172

x23x2isnegativefor:3172<x<3+172

x23x2ispositivefor:x<3172orx>3+172

2<x3172or0<x<2orx3+172

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