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

AP and TS EAMCET Engineering Model Paper 4

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If the harmonic mean between the roots of (5+√2)x2−bx+(8+2√5)=0 is 4, then the value of b

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