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What is a double inequality?

Updated: 4/28/2022
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11y ago

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A double inequality is an inequality where there are two signs, as opposed to one.

Ex: an inequality could be 3x < 15

A double inequality could be 3x < 15 < x + 20

If you'd want to solve that double inequality, you split it into to expressions:

3x < 15 and x + 20 > 15

Then just solve.

x < 5 and x > -5

-5 < x < 5

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11y ago
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Q: What is a double inequality?
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