If (a+b)=16 and a³+b³=1456, then what is the value of ab?

If x²+y²-4x-4y+8=0, then the value of x-y is: 

If 0.4 m + 0.8 n = 2.2 and 0.8 m + 0.4 n = 1.4, then the value of $$ {m^2}+{n^2}$$ is equal to 

Find the value of. 67²–33².

If x, y are two positive real number and  $$x^{1/3}=y^{1/4}$$, then which of the following relations is true?

If $$ {\sqrt{2x+9}+x=13}$$ then find the value of x?

If x + y + z=1, xy+yz+zx=-26 and x³ + y³+z³=151, then what will be the value of xyz?

If $$ {x=a^{2\over3}-a^{-2\over3}}$$ then the value of $$ {x^{3}+3x}$$.