If `a.b= a^2+b^2`,then the value of 2.4 is:

If the binary operation * on Z is defined by a*b=a^2-b^2+a b+4 , then value of (2*3)*4 is

If a=2 and b=-2, find the value of : (i) a^(2)+b^(2) (ii) a^(2)+ab+b^(2) (iii) a^(2)-b^(2)

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

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

If ab=2a+3b, agt0, b gt0 , then the minimum value of ab is

If ab=2a + 3b, a>0, b>0, then the minimum value of ab is

When a=3 , b=0 , c=-2 , then find the value of : ab+2bc+3ca+4abc.

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

Let ab=1,Delta=|{:(1+a^2-b^2, 2ab,-2b),(2ab,1-a^2+b^2, 2a),(2b,-2a,1-a^2-b^2):}| then the minimum value of Delta is :

In a triangle ABC if tan.(A)/(2)tan.(B)/(2)=(1)/(3) and ab = 4, then the value of c can be