Question

If -4 is a zero of the polynomial x2
- x - 2(2 - 2k) then the value of k is ________​

Answer 1

Answer:

let,

p(x)= 0

p(-4)=0

x²-x-4+4k=0

(-4)²-(-4)+4k= 0

16+4+4k=0

20+4k= 0

k= -5

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Answer 2

Answer:

k = - 4

Step-by-step explanation:

f(x) = x² - x - 2(2 - 2k)

f( - 4) = ( - 4)² - (- 4) - 2(2 - 2k) = 0

16 + 4 - 4 + 4k = 0 ⇒ k = - 4