Question

What should be added to the polynomial x2 – 5x + 4 so that 3 is a zero of
this polynomial?​

Answer 1

Answer:

2

Step-by-step explanation:

x^2 -5x +4 +2

3*3 -5 *3 +6

9-15+6 = 15-15 =0

Answer 2

Answer:

let k be added to the equation

so, the given equation is x2 - 5x +( 4 + k)

As 3 is the root of the given equation, it must satisfy the equation

(3)2 - 5(3) + 4 + k =0

6 - 15 + 4 + k = 0

-9 + 4 + k = 0

- 5 + k = 0

k= 5

Hence, the required no. is 5