If x+y+z=22 and xy+yz+zx=35, then what  is the value of (x-y)² +(y-z)²+(z-x)²?

lf p + m = 6 and p³ + m³ = 72, then the value of pm is: 

If bc+ab+ca=abc, then the value of $$ {b+c\over {bc(a-1)}}+{a-c\over {ac(b-1)}}+{a+b\over {ab(c-1)}}$$ is

If for two real constants a and b the expression ax³+3x²-8x+b is exactly divisible by (x+2) and (x-2), then 

If (a-b)² + (b-c)² + (c-a)² = 0, then find the value of (a³+b³+c³-3abc) ?

x-y=2, xy=24, then the value of (x²+y²) is:

If a+b=17,and a – b =9, then the value of $$ {(4a^2+4b^2)}$$ is:

If a-b=10 and ab=-21, then what is the value of a³-b³?