Question

If (x-3) is factor of polynomial (x³-4x²-3x+k) then k is​

Answer 1

Answer:

K=18

Step-by-step explanation:

x-3=0

Therefore x = 3

Now substituting in the place of x as 3

(3)^3-4(3)^2-3(3)+k=0

27-4(9)-9+k=0

18-36=-k

-18=-k

Therefore k=18

Answer 2

Answer:

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Step-by-step explanation:

x-3=0

x =+3 ( put value of x in polynomial)

• (x³ -4x² -3x +k) =0
• (3)³ -4(3)²-3×3 +k =0
• 27 -4×9 -9 + k =0
• 27 -36 -9 +k =0
• 27 -45 +k =0
• -18 +k =0
• k = +18