x² + x - 12 Given a rational expression x +4 a. specify at which value(s) of will the expression be undefined? b. select all the equivalent rational expressions of it. 2x² + 2x 24 2x + 8 x²y + xy xy + 4y (x+4) (x-3) x +4 3 (x − 4) (x + 3) x +4 X - 12y where y 0 I

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