You can put this solution on YOUR website! How do you solve ^16 sqrt -7^16?
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It's not an equation, and there's no variable, so there's nothing to solve.
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What does ^16 mean?
If it's the 16th root:
= 7 or -7
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If you expand (-7)^16, you get a big positive integer.
Then there are 16 16th roots of it, ± 7 being the most obvious.
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If you take = then it's -7.