Question

If 1 is zero of the polynomial p(x) = x - 2x² + 4x + k, then k =
B) 4
C) - 2
A) 1
D)-3
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Answer 1

Step-by-step explanation:

x=1 then

1. p(1)=1-2(1)square +4(1)+k
2. =-1+4+k
3. k=-3

Answer 2

Answer:

The answer is = -3.

we know that zero of the polynomial given is 1.

Now,

p(x) = x-2x^2 +4x+ k

p(1) = 1 - 2(1)^2 + 4×1 +k

0. = 1 - 2×1 + 4 + k

0 = 1 -2 +4 +k

0 = 5 - 2 + k

0 = 3 + k

-3 = k

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