Answer:
19
Step-by-step explanation:
Given the polynomial :
x2 + bx + 18 ;
The polynomial Given is if degree 2 ;
The equation can be solved using the quadratic function degree 2 to check which of the options given can be factored :
Here,
a = 1 ; b =? c = 18
Checking each option :
If b = 17
x2 + 17x + 18 = 0
x2 + 17x + x + 18 = 0
(x + 17)(x + 1)
If b = - 19
(x-1)(x-18)=0
