If a and b are the roots of the equation x2 - 7x + 7 = 0, then the value of a2 + b2 is:
Select the correct option:	A) 35	B) 24	C) 17	D) 6	E) 5

Rationale: sol . ( b ) the sum of roots = a + b = 7 product of roots = ab = 8 now , a 2 + b 2 = ( a + b ) 2 - 2 ab = 49 - 14 = 35 answer a
Answer: A