If the sum of a number and its square is 132, what is the number?	Choose one
A) 15
B) 11
C) 28
D) 91
E) none of these

Rationale: let the number be x . then , x + x 2 = 132 ( x + 12 ) ( x - 11 ) = 0 x = 11 answer : b
Answer: B