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With a little imagination, I am sure you can find lots of phrases that don't describe the square root of 625.With a little imagination, I am sure you can find lots of phrases that don't describe the square root of 625.With a little imagination, I am sure you can find lots of phrases that don't describe the square root of 625.With a little imagination, I am sure you can find lots of phrases that don't describe the square root of 625.
You have quite an imagination.
sqr(-30) is i*sqr(30) We use i to represent the sqr(-1) because it is called an imaginary number. It takes an imagination to work with it. It is not fictitious.
Any positive number x has two square roots: one positive and one negative. For example, +3 and -3 are both square roots of 9. Using a brilliant leap of imagination, mathematicians decided to call the first of these the positive root!
Experiments need imagination