Question

If one zero of polynomial x2 - 4x + k is 2, then
of k?
(a) 8
(b) 4
(c) - 4
(d) 0
The quadratic equation 2x2 - V5x +1=0 has
(a) Two distinct roots
(b) Two equal and real roots
(c) No real roots
(d) More than 2 real roots.​

Answer 1

Answer:

-4

Step-by-step explanation:

question1=(2)2-4(2)+k

k=4-8

k=-4

hope it helps you.

Answer 2

Answer:

If one zero of polynomial x2 - 4x + k is 2, then

of k?

(a) 8

(b) 4

(c) - 4

(d) 0

Answer: 2(2)-4(2)+k=0

4-8+k=0

-4+k=0

k=4

The quadratic equation 2x2 - V5x +1=0 has

(a) Two distinct roots

(b) Two equal and real roots

(c) No real roots

(d) More than 2 real roots.

Answer: a=4 , b=-√5 , c=1

b^2-4ac=0

(-√5)^2-4×4×1=0

-5-16=0

-21=0

No real roots

Hope you like the answer