If a²+b²+c² = 2(a – b – c) – 3 then the value of 4a – 3b + 5c is 

If $$ {x^{2}+3{x}+1=0}$$, then the value of $$ {x^{3}+{1\over {x^{3}}}}$$

Find the value of. 67²–33².

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

Value of $$ \sqrt{6+\sqrt {6+\sqrt {6+....}}}$$

If $$ {8x\over{2x^{2}+7x-2}}=1, x>0,$$ then what is the value of of $$ {x^{3}+{1\over x^{3}}}$$ ?

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

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