Find the radius of the circle x²+y²-4x+6y=12

If x = 2 then the value of x³ + 27x² + 243x + 631 is

if  , then is

if , then what is the value of

The HCF of x⁸ – 1 and x⁴ + 2x³ – 2x – 1 is :

If α, β are the roots of 6x²+13x+7=0, then the equation whose roots are α², β² is:

If x² + y² + z² = 2 (x + z – 1), then the value of : x³ + y³ + z³ = ?

If a = 34, b = c = 33, then the value of a³ + b³ + c³ – 3abc is