Fill in the Blank. Complete the following sentences.  a. In…

Fill in the Blank. Complete the following sentences.  a. In a radical expression that appears to have no index, the index is understood to be .    b. To reverse the process of squaring find the of a number.    c. In , the symbol, , is the and the 102 is called the .    d. Square roots of negative numbers are not numbers and are referred to as .