If the harmonic mean between roots of `(5+sqrt(2))x^2-b x+8+2sqrt(5)=0i s4` , then find the value of `bdot`

If the harmonic mean between roots of (5+sqrt(2))x^(2)-bx+8+2sqrt(5)=0 is 4, then find the value of b .

If the harmonic mean between the roots of (5+sqrt(2))x^(2)-bx+(8+2sqrt(5))=0 is 4 then the value of b is

IF the harmonic mean between the roots of (5 + sqrt(2))x^2-bx +(8+2sqrt(5))=0 is 4 then value of b is

IF the harmonic mean of the roots of sqrt(2) x^2-bx +(8-2sqrt(5))=0 is 4 then the value of b=

Find the roots of sqrt2 x^(2) + 7x + 5 sqrt2 = 0

If the difference between the roots of the equation x^(2)+ax+1=0 is less then sqrt(5) , then find the set of possible value of a .