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Imaginary number = i, i = √-1
therefore, i^2 = 1
Imaginary numbers lets us find square roots of negative numbers.
For example: √-25 = 5i 3i x 5i = 15 x i^2 = -15
Because remember, i^2 = -1, so -1 x 15=-15
Imaginary numbers behave like square roots.
3i + 5 = 3i + 5, not 8i. 3i + 5i = 8i
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