187k views
0 votes
F(x)=x^3-3x^2+4x-2 use the polynomial remainder theorem to evaulate F(5)

2 Answers

6 votes

The Polynomial Remainder Theorem states that if you divide a polynomial f(x) by (x - a), the remainder is equal to f(a). In this case, you want to evaluate the polynomial f(x) = x^3 - 3x^2 + 4x - 2 at x = 5.

f(5) = 5^3 - 3(5)^2 + 4(5) - 2

Now, calculate the values:

f(5) = 125 - 3(25) + 20 - 2
f(5) = 125 - 75 + 20 - 2
f(5) = 125 - 75 - 2 + 20
f(5) = 50 - 2 + 20
f(5) = 48 + 20
f(5) = 68

So, when you evaluate the polynomial f(x) at x = 5, you get f(5) = 68.
User Dewey
by
7.2k points
5 votes

Answer:

68

Explanation:

x^2 - 2x + 2

______________

x - 5 | x^3 - 3x^2 + 4x - 2

- (x^3 - 5x^2)

______________

2x^2 + 4x - 2

- (2x^2 - 10x)

______________

14x - 2

- (14x - 70)

______________

68

User Matt Van Horn
by
7.6k points