Find the Remainder (3x^4+x^2+3)/(x+1)

$\frac{3 x^{4} + x^{2} + 3}{x + 1}$

To calculate the remainder, first divide the polynomials.

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

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

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

$3 x^{3}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

Multiply the new quotient term by the divisor.

$3 x^{3}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

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

$3 x^{3}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

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

$3 x^{3}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

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

$3 x^{3}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

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

$3 x^{3}$

$3 x^{2}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

Multiply the new quotient term by the divisor.

$3 x^{3}$

$3 x^{2}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

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

$3 x^{3}$

$3 x^{2}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

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

$3 x^{3}$

$3 x^{2}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

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

$3 x^{3}$

$3 x^{2}$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

Divide the highest order term in the dividend $4 x^{2}$ by the highest order term in divisor $x$ .

$3 x^{3}$

$3 x^{2}$

$4 x$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

Multiply the new quotient term by the divisor.

$3 x^{3}$

$3 x^{2}$

$4 x$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

$4 x^{2}$

$4 x$

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

$3 x^{3}$

$3 x^{2}$

$4 x$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

$4 x^{2}$

$4 x$

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

$3 x^{3}$

$3 x^{2}$

$4 x$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

$4 x^{2}$

$4 x$

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

$3 x^{3}$

$3 x^{2}$

$4 x$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

$4 x^{2}$

$4 x$

$3$

Divide the highest order term in the dividend $- 4 x$ by the highest order term in divisor $x$ .

$3 x^{3}$

$3 x^{2}$

$4 x$

$4$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

$4 x^{2}$

$4 x$

$3$

Multiply the new quotient term by the divisor.

$3 x^{3}$

$3 x^{2}$

$4 x$

$4$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

$4 x^{2}$

$4 x$

$3$

$4 x$

$4$

The expression needs to be subtracted from the dividend, so change all the signs in $- 4 x - 4$

$3 x^{3}$

$3 x^{2}$

$4 x$

$4$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

$4 x^{2}$

$4 x$

$3$

$4 x$

$4$

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

$3 x^{3}$

$3 x^{2}$

$4 x$

$4$

$x$

$1$

$3 x^{4}$

$0 x^{3}$

$x^{2}$

$0 x$

$3$

$3 x^{4}$

$3 x^{3}$

$x^{2}$

$3 x^{3}$

$3 x^{2}$

$4 x^{2}$

$0 x$

$4 x^{2}$

$4 x$

$3$

$4 x$

$4$

$7$

The final answer is the quotient plus the remainder over the divisor.

$3 x^{3} - 3 x^{2} + 4 x - 4 + \frac{7}{x + 1}$

Since the last term in the resulting expression is a fraction, the numerator of the fraction is the remainder.

$7$

Find the Remainder (3x^4+x^2+3)/(x+1)

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