If a\b + b\a =1, then the value of a³+b³ will be 

If  $${3-5x\over 2x}+{3-5y\over 2y}+{3-5z\over 2z}=0$$ then the value of  $${2\over x}+{2\over y}+{2\over z}$$ is:

If a+b+c=15 and a²+b²+c²=83 then the value of a³+b³+c³-3abc

If x+y=10 and xy=4, then what is the value of x⁴+y⁴=?

Find the minimum value of x which the expression  
x³-7x²+11x - 5 ≥ 0.

If $$ {x=2-2^{1\over 3}+2 ^{2\over 3}}$$, then the value of $$ {x^{3}-6x^{2}+18x+18}$$.

If x - y = 3, then what is the value of x³ - y³-9xy?