If x + y + 3 = 0 , then find the value of x³+y³-9xy+9.

if 2x² – 7x + 5 =0, then what is the value of

If , then the value of (p⁶ + q⁶ ) is

If    then the value of a³ + b³ is 

If a + b + c = 6, a² + b² + c² = 14 and a³ + b³ + c³ = 36, then the value of abc is

If a + b + c = 6, a³ + b³+c³-3abc=342, then what is the value of ab + bc + ca?

If 27(x+y)³ – 8(x-y)³=(x+5y)(Ax²+By²+Cxy), then what is the value of (A+B-C)?

If x = 19 and y = 18, then the value of   is