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5 votes
5 votes
Find the value of c so that the polynomial p(x) is divisible by (x-3).

p(x) = -x^3 + cx^2 -4x + 3

User Timothy Nwanwene
by
3.0k points

2 Answers

15 votes
15 votes

Answer:

4

Explanation:

User Wizofwor
by
2.8k points
9 votes
9 votes

Answer:

c = 4.

Explanation:

If p(x) is divisible by (x-3) then p(3) = 0 (By the Factor Theorem), so

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

-27 + 9c - 12 + 3 = 0

9c = 27 + 12 - 3

9c = 36

c = 4.

User Anggrayudi H
by
2.7k points