Divide Using Long Polynomial Division (3x^4-4x^3+1)÷(3x^3-x^2-x-1)

$(3 x^{4} - 4 x^{3} + 1) \div (3 x^{3} - x^{2} - x - 1)$

Step 1

Set up the polynomials to be divided. If there is not a term for every exponent, insert one with a value of $0$ .

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

Step 2

Divide the highest order term in the dividend $3 x^{4}$ by the highest order term in divisor $3 x^{3}$ .

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

Step 3

Multiply the new quotient term by the divisor.

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

$3 x^{4}$

$x^{3}$

$x^{2}$

$x$

Step 4

The expression needs to be subtracted from the dividend, so change all the signs in $3 x^{4} - x^{3} - x^{2} - x$

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

$3 x^{4}$

$x^{3}$

$x^{2}$

$x$

Step 5

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

$3 x^{4}$

$x^{3}$

$x^{2}$

$x$

$3 x^{3}$

$x^{2}$

$x$

Step 6

Pull the next terms from the original dividend down into the current dividend.

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

$3 x^{4}$

$x^{3}$

$x^{2}$

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

Step 7

Divide the highest order term in the dividend $- 3 x^{3}$ by the highest order term in divisor $3 x^{3}$ .

$x$

$1$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

$3 x^{4}$

$x^{3}$

$x^{2}$

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

Step 8

Multiply the new quotient term by the divisor.

$x$

$1$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

$3 x^{4}$

$x^{3}$

$x^{2}$

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{3}$

$x^{2}$

$x$

$1$

Step 9

The expression needs to be subtracted from the dividend, so change all the signs in $- 3 x^{3} + x^{2} + x + 1$

$x$

$1$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

$3 x^{4}$

$x^{3}$

$x^{2}$

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{3}$

$x^{2}$

$x$

$1$

Step 10

After changing the signs, add the last dividend from the multiplied polynomial to find the new dividend.

$x$

$1$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{4}$

$4 x^{3}$

$0 x^{2}$

$0 x$

$1$

$3 x^{4}$

$x^{3}$

$x^{2}$

$x$

$3 x^{3}$

$x^{2}$

$x$

$1$

$3 x^{3}$

$x^{2}$

$x$

$1$

$0$

Step 11

Since the remander is $0$ , the final answer is the quotient.

$x - 1$

Divide Using Long Polynomial Division (3x^4-4x^3+1)÷(3x^3-x^2-x-1)

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