If then what is the value of P?

If and , then what is the value of A - B?

Simplify the following expression.

 25-(4÷2)+11.5+9.5

What is the value of ?

The sum of the squares of two positive integers is 100 and the difference of their squares is 28. The sum of the numbers is: 

If the sum of {a\over b}and its reciprocal is 1 and a ≠ 0, b ≠ 0, then the value of a³ + b³ is

If a³ – b³ – c³ – 3abc = 0, then 

The value of (x + y + z)³ – (y + z – x)³ – (z + x – y)³ – (x + y – z)³ is: