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25a2-6400

The above is a perfectly correct answer to the question as posed.

However, the question as written makes so little sense that I suspect this is another homework assignment that got slightly garbled in transmission. The original question was very likely : -

5a2 - 80 = 0. Solve for a.

If so, the answer is a = +4 or -4.

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15y ago

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Q: What is 5a squared minus 80 squared?
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