plus or minus 3i
glad to see there are other homeschoolers here.
Nope. positive or negative 3i. A square root of a number is a number that, when multiplied by itself, will produce said number. 3i is a square root of -9 because it produces 9*-1, which equals -9. However, -3i is also a square root.The correct answer to the square root of -9, is just (positive)3i.
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