If a and b are the roots of the equation x2 - 7x + 7 = 0, then the value of a2 + b2 is:  Choose the correct choice from the following answers
A) 35	B) 24	C) 17	D) 6	E) 5
Sol.(b) The sum of roots = a+ b = 7   Product of roots = ab = 8   Now, a2 + b2 = (a + b)2 - 2ab = 49 - 14= 
<gadget id="calculator">49 - 14</gadget>
<output>35</output>
35   35nswer 35
<result>A</result>
If a and b are the roots of the equation x2 - 7x + 7 = 0, then the value of a2 + b2 is: