Question

If 1 is the zero of quadratic polynomial x^2+kx-5 , then find value of k​

Answer 1

Answer:

k = 4

Step-by-step explanation:

If 1 is the zero of quadratic polynomial x²+kx-5 , then find value of k​

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Put x = 1,

$x^2+kx-5=0 \\ 1^2+k(1)-5=0\\ 1+k-5=0 \\ k-4=0\\k=4$

Answer 2

Answer:

value of k = 4

substituting one in place of x

(1)^2 + k (1)-5

k-4=0

k=4