If the sum of a number and its square is 342, What is the number? Choose the correct choice.
A) 16
B) 77
C) 25
D) 87
E) 18

Rationale: "explanation : let the integer be x . then , x + x 2 = 342 x 2 + x - 342 = 0 ( x + 19 ) ( x – 18 ) = 0 x = 18 answer : e"
Answer: E