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If (m+1) and (m-3) are factors of m2−km+c, find the values of k and c.

A) k=2, c=3
B) k=4, c=5
C) k=6, c=9
D) k=8, c=12

1 Answer

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Final answer:

To find the values of k and c, we can set up a system of equations using the fact that (m+1) and (m-3) are factors of m2−km+c. Solving this system of equations, we find k = 0 and c = 0.

Step-by-step explanation:

To find the values of k and c, we need to use the fact that (m+1) and (m-3) are factors of m2−km+c. This means that when we substitute m = -1 and m = 3 into the equation, the equation should equal zero. Let's set up the equation:

(-1+1)(-1-3) = 0

(3+1)(3-3) = 0

Expanding these equations, we get:

0 = -4k + c

0 = 16k + c

Now, we have a system of equations. Solving these equations will give us the values of k and c:

Adding the two equations together, we get:

0 = 12k + 2c

Dividing by 2, we get:

0 = 6k + c

Substituting this equation into one of the previous equations, we get:

0 = -4k + (6k + c)

Simplifying, we get:

0 = 2k + c

From this equation, we can see that k = -c/2.

If we substitute this value of k into one of the original equations, we can solve for c:

0 = 6(-c/2) + c

Simplifying, we get:

0 = -3c + 2c

Solving for c, we get:

c = 0

Substituting this value of c into the equation k = -c/2, we get:

k = 0

Therefore, the values of k and c are k = 0 and c = 0.

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