[2*76,x=(sqrt(20+1)+sqrt(20-1))/(sqrt(20+1)-sqrt(20-1))," prove is an "],[x^(2)-4ax+1=0]

If x=(sqrt(2a+1)+sqrt(2a-1))/(sqrt(2a+1)-sqrt(2a-1)) , prove that x^(2)-4ax+1=0

If x=(sqrt(2a+1)+sqrt(2a-1))/(sqrt(2a+1)-sqrt(2a-1)), than show that x^(2)-4ax+1=0

Evaluate sqrt(20+sqrt(20+sqrt(20)))

(1)/(sqrt(x^(2)-8x-20))

sqrt((20+x)/(x))*sqrt((20-x)/(x))=sqrt(6)

sqrt(x+4)+sqrt(x+20)=2sqrt(x+11)

sqrt(20){(sqrt(20)+1)^(100)-(sqrt(20)-1)^(100)} is a/an ___________

Prove that sqrt(20+sqrt(20+sqrt(20+...)))=5

If x=(sqrt(a+1)+sqrt(a-1))/(sqrt(a+1)-sqrt(a-1)) , using properties of proportion show that x^(2)-2ax+1=0