How do you solve the system of inequalities: #-x ^ { 2} + 4< 0 and x ^ { 2} - 2x - 3\geq 0#?
1 Answer
Another way of writing this:
Where the brackets ( or ) means 'excluding' and the brackets [ or ] means including. The
Explanation:
You have two quadratics. The solutions are:
For the cut off point set
But we need
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For the cut of point set
But we need
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Depending on the context of this type of problem you either need the 'boundaries' that are closest going inward or the furthest going outwards to construct the domains. The key point is that they do not cross over within the context of this question