Find the value of a/b + b/a, if a and b are the roots of the quadratic equation x2 + 9x +3 = 0?
Select: A) 28.3 B) 1.45 C) 2.78 D) 6.84 E) 7.23
a/b + b/a = (a2 + b2)/ab = (a2 + b2 + a + b)/ab   = [(a + b)2 - 2ab]/ab   a + b = -9/1 = -9   ab = 3/1= 
<gadget id="calculator">3/1</gadget>
<output>3</output>
3   Hence a/b + b/a= [(-9)2 - 2(3)]/3 = 56/4 = 28.3.   28.3)
<result>A</result>
Find the value of a/b + b/a, if a and b are the roots of the quadratic equation x2 + 9x +3 = 0?