Question

If -2 is one of the zeroes of the polynomial x2-x+ k, then the value of k is​

Answer 1

Answer:

-6

Step-by-step explanation:

(-2)^2-(-2)+k = 0

4+2+k = 0

6+k = 0

So,

k = 0-6

k = -6

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Answer 2

Answer:

The answer is $k=-6$

Step-by-step explanation:

• Concept : If $\alpha$ is a zero of polynomial P(x), then $P(\alpha)=0$

      Here given $-2$ is a zero of $P(x)=x^2-x+k$

                         

                                     $\Rightarrow P(-2)=0\\\Rightarrow (-2)^2-(-2)+k=0\\\Rightarrow 4+2+k=0\\\Rightarrow 6+k=0\\\Rightarrow k=-6$