" a) "(81a^(2)-4)+(9a+2)

((81)^(-2))^(1/4)=

[{(-1/3)^2}^(-2)]^(-1) = (a) 1/(81) (b) 1/9 (c) -1/(81) (d) -1/9

[{(-1/3)^2}^(-2)]^(-1) = (a) 1/(81) (b) 1/9 (c) -1/(81) (d) -1/9

If 3a+(1)/(3a) = 2sqrt3 , evaluate: 81 a^(4) + (1)/(81a^(4))

Factorise:- (81a^2- 72ab + 16b^2)

if (6x^2-5x-3)/(x^2-2x+6)<=4 , then the least and the highest values of 4x^2 are : (a) 0 and 81 (b) 9 and 81 (c) 36 and 81 (d) None of these

Expand : (w-9)^(2) A. (w^(2)-9w+81) B. (w^(2)-9w+18) C. (w^(2)-18w+81) D. (w^(2)-18w-81)

If\ \ sqrt(2^n)=1024 ,\ \ then 3^(2(n/4-4))= (a)3 (b) 9 (c) 27 (d) 81

Factorize: (a^(4)-8a^(2)b^(2)+16b^(4))-256a^(4)-6a^(2)b^(2)+9b^(4)-81