1-(a^(2)+b^(2))+2ab

If a = 2 and b = -1 , then a^(2) + b^(2) + 2ab = "________"

If (x+1)/(x-1)=(a)/(b) and (1-y)/(1+y)=(b)/(a), then the value of (x-y)/(1+xy) is (2ab)/(a^(2)-b^(2)) (b) (a^(2)-b^(2))/(2ab) (c) (a^(2)+b^(2))/(2ab) (d) (a^(2)-b^(2)backslash)/(ab)

If [ sqrt (a ^(2) + b^(2) + ab)] + [ sqrt (a^(2) + b^(2) - ab)] = 1 then what is the value of (1 - a^(2)) (1 - b^(2)) ?

1-2ab - (a ^(2) +b ^(2)) = ?

The value of the determinant |{:(1+ a^(2) - b^(2),2 ab , - 2b),(2ab, 1 - a^(2) + b^(2), 2a),(2b , -2a , 1-a^(2) - b^(2)):}| is equal to

Find the values of each of the following expressions for a=1,b=2 and c=-1a^(2)+b^(2)+2ab( ii) 2a^(2)-b^(2)c+3abc

Find the tangent of the angle between the lines whose intercepts on the axes are respectively a ,-b and b ,-a ............... A) tan ^(-1)""(a^(2) +b^(2))/(ab) B) tan ^(-1)""(b ^(2) -a^(2))/(2) C) tan ^(-1)""(b^(2) -a^(2))/(2ab) D) tan ^(-1)""(b^(2) -a^(2))/(ab)

If a and b are real and i=sqrt(-1) then sin[i ln((a+ib)/(a-ib))] is equal to 1) (2ab)/(a^(2)-b^(2)) 2) (-2ab)/(a^(2)-b^(2)) 3) (2ab)/(a^(2)+b^(2)) 4) (-2ab)/(a^(2)+b^(2))

Find the value of the expressions, when a= -1" and "b= 3 a^(2)+b^(2)+2ab