If a and b are the roots of the equation x2 - 8x + 8 = 0, then the value of a2 + b2 is:	Choose one: A) 36 B) 48 C) 17 D) 6 E) 5

Rationale: "sol . ( b ) the sum of roots = a + b = 8 product of roots = ab = 8 now , a 2 + b 2 = ( a + b ) 2 - 2 ab = 64 - 16 = 48 answer b"
Answer: B