Question

1) If x+1 is a factor of the polynomial
2x2 + kx + 1, then the value of 'k' is *​

Answer 1

Step-by-step explanation:

Let p(x) = 2x2 + kx+1

Since, (x + 1) is a factor of p(x), then

p(-1)=0

2(-1)2 + k(-1) +1 = 0

⇒ 2-k = 0

⇒ k= 2

Hence, the value of k is 2.

Answer 2

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Answer:

5

Step-by-step explanation:

x + 1 = 0

x = - 1

so, putting x = -1

p(x)=4+kx+1

0=4+k(-1)+1

0=4-k+1

0=5-k

k=5

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