Find the value of a/b + b/a, if a and b are the roots of the quadratic equation x2 + 10x +5 = 0?  Choose the correct choice from the following answers
A) 6
B) 42
C) 24
D) 18
E) 95
a/b + b/a = (a2 + b2)/ab = (a2 + b2 + a + b)/ab   = [(a + b)2 - 2ab]/ab   a + b = -10/1 = -10   ab = 5/1= 
<gadget id="calculator">5/1</gadget>
<output>5</output>
5   Hence a/b + b/a= [(-10)2 - 2(5)]/5 = 90/5= 
<gadget id="calculator">90/5</gadget>
<output>18</output>
18.   18)
<result>D</result>
Find the value of a/b + b/a, if a and b are the roots of the quadratic equation x2 + 10x +5 = 0?