Question

If one of the zeroes of the quadratic
polynomial x² + 2x + k is 2 then find value of K.
​

Answer 1

Step-by-step explanation:

we know that 2 is one of the zeroes of the polynomial x^2+2x+k

so,

2^2+2(2)+K =0

4+4+k =0

8+k=0

k=–8

Answer 2

Answer:

LET ALPHA BE ONE ZERO OF THE QUADRATIC POLYNOMIAL = 2

LET THE OTHER ZEROS OF THE QUADRATIC POLYNOMIAL BETA.

HERE;

a= 1

b= 2

c= k

alpha + beta = (-b)/a

alpha*beta = c/a

where a the coefficient of x^2; b is the coefficient of x ; she is the coefficient of constant term.

by using this all formula we can solve this problem.

please see the attachment.