[" 4.Evaluate: "],[[" (i) "((a)/(2b)+(2b)/(a))^(2)-((a)/(2b)-(2b)/(a))^(2)-4]]

Evaluate ((a)/(2b)+(2b)/(a))^(2)-((a)/(2b)-(2b)/(a))^(2)-4 .

Evaluate: ((a)/(2b) + (2b)/(a))^(2)- ((a)/(2b)- (2b)/(a))^(2)- 4

Evaluate : (i) ((a)/(2b)+(2b)/(a))^(2)-((a)/(2b)-(2b)/(a))^(2)-4 (ii) (4a+3b)^(2)-(4a-3b)^(2)+48ab

Evaluate : (iii) ((a)/(2b ) + (2b )/( a) ) ( ( a)/( 2b ) - (2b)/( a))

Evaluate : (iii) (2a - b) ( 2a + b) (4a^2 + b^2)

Evaluate : (i) (a+6b)^(2) " " (ii) (3x-4y)^(2) " " (iii) (2a-b+c)^(2)

Evaluate : (i) (a+6b)^(2) " " (ii) (3x-4y)^(2) " " (iii) (2a-b+c)^(2)

If A is the A.M between a and b prove that : (i) (A-a)^(2)+(A-b)^(2)=1/2(a-b)^(2) (ii) 4(a-A)(A-b)=(a-b)^(2)

Find the square root of (a^(2))/(b^(2))+(b^(2))/(a^(2))+(1)/(2i)((a)/(b)+(b)/(a))+(31)/(16) .

If (15a^(2)+4b^(2))/(15a^(2)-4b^(2))=(47)/(7) then find the values of the following (i) (a)/(b) (ii) (7a-3b)/(7a+3b) (iii) (b^(2)-2a^(2))/(b^(2)+2a^(2))