Ikoyojedaviz
Answered

7. Armie wants to determine the value of k so that (x – 3) will be a factor of (x3 + kx + 3). What is k?
C. - 12
D. – 10
A. - 16
B. - 14
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Sagot :

Suprathiksirimilla20viz

Answer:

Since x - 3 is a factor, x - 3 = 0.

So, x = 3.

Now, substitute this in the given equation:

⇒ x³ + kx + 3 = 0

⇒ 3³ + 3k + 3 = 0

⇒ 27 + 3k + 3 = 0

⇒3k = -30

⇒ k = -10.

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