" 3."4sqrt(9)quad A=[[1,2],[4,2]]," " fagls "|2A|=4|A|

If A = [[3,sqrt3,2],[4,2,0] and B = [[2,-1,2],[1,2,4]] , verify that : (A')'=A

sqrt(4)=2. because 2^(2)=4sqrt(9)=3, because 3^(2)=9sqrt(324)=18, because 18^(2)=324

sqrt(2)x^(2)+9x+4sqrt(2)

3sqrt(2^(5))sqrt(4^(9))sqrt(8)=

[ 8- ((4^(9/4 ) sqrt(2.2 ^2))/( 2 sqrt( 2^(-2))))^(1/2) ] is equal to

3sqrt(4)+2sqrt(9)+5sqrt(4)-sqrt(1)-4sqrt(9)

sin( 67 1/2)^(@) + cos( 67 1/2)^(@) is equal to A) 1/2sqrt(4+2sqrt(2)) , B) 1/2sqrt(4-2sqrt(2)) , C) 1/4(sqrt(4+2sqrt(2))) , D) 1/4(sqrt(4-2sqrt(2)))

sin(67 1/2)^(@) + cos( 67 1/2)^(@) is equal to A) 1/2sqrt(4+2sqrt(2)) , B) 1/2sqrt(4-2sqrt(2)) , C) 1/4(sqrt(4+2sqrt(2))) , D) 1/4(sqrt(4-2sqrt(2)))

(9+4sqrt(5))^(x)+(9-4sqrt(5))^(x)=18, then find x^(2)-(1)/(x^(2))