Question

Which of the following number should be added to the polynomial x2-5x+4
so that '3' is the zero of the resulting polynomial
(A) 1
(B) 2
(C) 4
(D) 5
O Option 1
O
Option 2
Options​

Answer 1

Answer:

(B) 2.

Step-by-step explanation:

Let k be added to the polynomial to get the result as 3

Thus,

x²-5x+4+k= 0, x=3

=> (3)²-5(3)+4+k=0

=> 9-15+4+k = 0

=> k-2 = 0

=> k=2.