Find the value of` (2*3)*4`if `a*b=a^2+b^2`

Find the value of 2a^(3)-b^(4)+3a^(2)b^(3) when a =3 , b=-1 .

If a : b=2:5, . find the value of (3a+2b)/(4a+b)

Find the value of : 3abc-2a^2+4b^3+ac given that a=-2,b=3 and c=-1

If a= 2, b= 3 and c= 4, find the value of : (ab + bc + ca- a^(2) -b^(2)-c^(2))/(3abc-a^(3)-b^(3)-c^(3)) , using suitable identity

If 3a + 4b =9 and ab= 2 find the value of : 27 a^(3) + 64 b ^(3)

If a = 2, b = 3 and c = -2, find the value of a^(2)+b^(2)+c^(2)-2b-2bc-2ca+3abc

If a + b + c = 0 and a^(2) + b^(2) + c^(2) = 4, them find the value of a^(4) + b^(4) +c^(4) .

When a=3 , b=0 , c=-2 , find the value of : 1/2a^4 + 2/3b^2c^2 - 1/9a^2c^2 +c^3 .

If a+b=7 and a b=12 , find the value of (a^2-a b+b^2)

If a+b=7 and a b=12 , find the value of (a^2-a b+b^2)