is not written, then it is assumed to be two, and the radical is a square root. In general, For example: There are two special rules for radical expressions with even indexes, i.e. "even roots." •The even root of a quanity is always assumed to be positive, i.e. ...
CalculatethecuberootofanumberReversesthesign +/- xy Calculatesanypower;tosincalculate24,youkeyin2xycos4tan Calculationrules •B–Brackets.Workingoutanythinginbracketsfirst.Whenthereismorethanonesetofbrackets,workfromtheoutsidetotheinnersets.•O–Of.change‘of’to‘×’andworkitout.•D–Divide.•M...