if x+3is a factor of
3x^2 + kx + 6
find value of k
Answers
Answered by
0
Answer:
the value of k is equal to 11
Answered by
6
Answer:
11
Step-by-step explanation:
If x+3 is a factor
Then,
x+3 = 0
x = - 3
Putting x = - 3 on 3x² + kx + 6
Then,
3(-3)² + k(-3) + 6 = 0
27 - 3k + 6 = 0
33 = 3k
k = 33/3
k = 11
Proof -
Putting Value of k on 3x² + kx + 6
3x² + 11x + 6
3x² + 9x + 2x + 6
3x(x+3) + 2(x+3)
(3x+2)(x+3)
Factors are -
(3x+2) and (x+3)
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