Which statements must be true it says check alll that apply ?

Plzzz maths ! quadratic sequences=an^2+c 1) 11,17,27,41,59 2) 7,16,31,52,79 3) 6,18,38,66,102 4) 0,9,24,45,72 5) 0,12,32,60,96

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Aquadratic equation in standard from is written ax^2= bx+c, where a, b and c are real numbers and a is not zero?