Question

9. If x + k is a factor of the polynomial x^3 + kx ^2- 2x + k + 4 find the value of k.​

Answer 1

Answer:

Here, x= -k

f(-k) =0

Or -K³+k(-k) ²-2(-k) +5=0

Or, -K³+k³+2k+5=0

Or, 2k= -5

Thus, k = -5/2

Answer 2

Answer:

x = -k

Step-by-step explanation:

 f(x) = x³ + kx² - 2x + k + 4 = 0

 f(k) = k³ - k³ + 2k + k + 4 = 0

⇒ 3k + 4 = 0

⇒3k = -4

⇒k = 3/4

Brainliest please..........................................................