Question

if(x-1) is a factor of x⁴+kx³+2x²-1 find the value of k ​

Answer 1

Answer:

Hope it helps

Step-by-step explanation:

x-1=x=1

(1)^4+k (1)^3+2 (1)^2-1

1+k+2-1=0

k+2=0

k=(-2)

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Answer 2

Answer:

x-1 = 0

x = 1

now;

x4 + kx3 + 2x2 - 1 ( x = 1 )

1 + k*1 + 2*1 - 1 = 0

1 + k*1 + 2 - 1 = 0

k +1 -1 +2 = 0

k + 0 + 2 = 0

k+ 2 = 0

k = -2