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Not necessarily. If it is the same radical number, then the signs cancel out. Radical 5 times radical 5 equals 5. But if they are different, then you multiply the numbers and leave them under the radical sign. Example: radical 5 * radical 6 = radical 30
The number under the radical sign (also known as the radical) is called the radican.
Christoff Rudolff was a German mathematician who introduced the radical sign in 1525
A function that has a variable under a radical sign.
Replace the radical sign with the exponent 0.5. For example sqrt(7) = 70.5