Mathematics, 21.06.2019 18:30, ldldunker

[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are -1 and 4. but why not positive 1?

$[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are$

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[10 points, algebra 2-simplifying complex fractions]according to my answer key the restrictions are...