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

if  , then is

P = 12xy – 10y² – 18x²,

Q = 14x² + 12y² + 9xy, and

R = 5y² – x² + xy

then (P + Q) – R =

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

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