Question

8+
$\sqrt{4}$
$8 + \sqrt{4} 2(4)$


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Answer 1

ANSWER

Given equation 

(5+2)x2−(4+5)x+8+25=0

Let α,β be the roots of the equation

α+β=5+24+5

αβ=5+28+25

Now, harmonic mean H=α+β2αβ

2×2(4+root 5)

= _____________

5+root 2

_____________

4+root 5

H = 4

The meaning of root is sign of root.

This is the write equation.