Pre-Algebra Examples

$\frac{- 10 r^{4} + 20 r^{3} - 16 r^{2} + 1 r + 19}{- 2 r}$

Step 1

Multiply $r$ by $1$ .

$\frac{- 10 r^{4} + 20 r^{3} - 16 r^{2} + r + 19}{- 2 r}$

Step 2

Move the negative in front of the fraction.

$- \frac{- 10 r^{4} + 20 r^{3} - 16 r^{2} + r + 19}{2 r}$

Step 3

Factor $- 1$ out of $- 10 r^{4}$ .

$- \frac{- (10 r^{4}) + 20 r^{3} - 16 r^{2} + r + 19}{2 r}$

Step 4

Factor $- 1$ out of $20 r^{3}$ .

$- \frac{- (10 r^{4}) - (- 20 r^{3}) - 16 r^{2} + r + 19}{2 r}$

Step 5

Factor $- 1$ out of $- (10 r^{4}) - (- 20 r^{3})$ .

$- \frac{- (10 r^{4} - 20 r^{3}) - 16 r^{2} + r + 19}{2 r}$

Step 6

Factor $- 1$ out of $- 16 r^{2}$ .

$- \frac{- (10 r^{4} - 20 r^{3}) - (16 r^{2}) + r + 19}{2 r}$

Step 7

Factor $- 1$ out of $- (10 r^{4} - 20 r^{3}) - (16 r^{2})$ .

$- \frac{- (10 r^{4} - 20 r^{3} + 16 r^{2}) + r + 19}{2 r}$

Step 8

Factor $- 1$ out of $r$ .

$- \frac{- (10 r^{4} - 20 r^{3} + 16 r^{2}) - 1 (- r) + 19}{2 r}$

Step 9

Factor $- 1$ out of $- (10 r^{4} - 20 r^{3} + 16 r^{2}) - 1 (- r)$ .

$- \frac{- (10 r^{4} - 20 r^{3} + 16 r^{2} - r) + 19}{2 r}$

Step 10

Rewrite $19$ as $- 1 (- 19)$ .

$- \frac{- (10 r^{4} - 20 r^{3} + 16 r^{2} - r) - 1 (- 19)}{2 r}$

Step 11

Factor $- 1$ out of $- (10 r^{4} - 20 r^{3} + 16 r^{2} - r) - 1 (- 19)$ .

$- \frac{- (10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19)}{2 r}$

Step 12

Rewrite $- (10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19)$ as $- 1 (10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19)$ .

$- \frac{- 1 (10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19)}{2 r}$

Step 13

Move the negative in front of the fraction.

$- - \frac{10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19}{2 r}$

Step 14

Multiply $- 1$ by $- 1$ .

$1 \frac{10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19}{2 r}$

Step 15

Multiply $\frac{10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19}{2 r}$ by $1$ .

$\frac{10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19}{2 r}$

Step 16

Split the fraction $\frac{10 r^{4} - 20 r^{3} + 16 r^{2} - r - 19}{2 r}$ into two fractions.

$\frac{10 r^{4} - 20 r^{3} + 16 r^{2} - r}{2 r} + \frac{- 19}{2 r}$

Step 17

Split the fraction $\frac{10 r^{4} - 20 r^{3} + 16 r^{2} - r}{2 r}$ into two fractions.

$\frac{10 r^{4} - 20 r^{3} + 16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 18

Split the fraction $\frac{10 r^{4} - 20 r^{3} + 16 r^{2}}{2 r}$ into two fractions.

$\frac{10 r^{4} - 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 19

Split the fraction $\frac{10 r^{4} - 20 r^{3}}{2 r}$ into two fractions.

$\frac{10 r^{4}}{2 r} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 20

Cancel the common factor of $10$ and $2$ .

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Step 20.1

Factor $2$ out of $10 r^{4}$ .

$\frac{2 (5 r^{4})}{2 r} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 20.2

Cancel the common factors.

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Step 20.2.1

Factor $2$ out of $2 r$ .

$\frac{2 (5 r^{4})}{2 (r)} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 20.2.2

Cancel the common factor.

$\frac{2 (5 r^{4})}{2 r} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 20.2.3

Rewrite the expression.

$\frac{5 r^{4}}{r} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 21

Cancel the common factor of $r^{4}$ and $r$ .

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Step 21.1

Factor $r$ out of $5 r^{4}$ .

$\frac{r (5 r^{3})}{r} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 21.2

Cancel the common factors.

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Step 21.2.1

Raise $r$ to the power of $1$ .

$\frac{r (5 r^{3})}{r^{1}} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 21.2.2

Factor $r$ out of $r^{1}$ .

$\frac{r (5 r^{3})}{r \cdot 1} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 21.2.3

Cancel the common factor.

$\frac{r (5 r^{3})}{r \cdot 1} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 21.2.4

Rewrite the expression.

$\frac{5 r^{3}}{1} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 21.2.5

Divide $5 r^{3}$ by $1$ .

$5 r^{3} + \frac{- 20 r^{3}}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 22

Cancel the common factor of $- 20$ and $2$ .

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Step 22.1

Factor $2$ out of $- 20 r^{3}$ .

$5 r^{3} + \frac{2 (- 10 r^{3})}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 22.2

Cancel the common factors.

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Step 22.2.1

Factor $2$ out of $2 r$ .

$5 r^{3} + \frac{2 (- 10 r^{3})}{2 (r)} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 22.2.2

Cancel the common factor.

$5 r^{3} + \frac{2 (- 10 r^{3})}{2 r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 22.2.3

Rewrite the expression.

$5 r^{3} + \frac{- 10 r^{3}}{r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 23

Cancel the common factor of $r^{3}$ and $r$ .

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Step 23.1

Factor $r$ out of $- 10 r^{3}$ .

$5 r^{3} + \frac{r (- 10 r^{2})}{r} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 23.2

Cancel the common factors.

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Step 23.2.1

Raise $r$ to the power of $1$ .

$5 r^{3} + \frac{r (- 10 r^{2})}{r^{1}} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 23.2.2

Factor $r$ out of $r^{1}$ .

$5 r^{3} + \frac{r (- 10 r^{2})}{r \cdot 1} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 23.2.3

Cancel the common factor.

$5 r^{3} + \frac{r (- 10 r^{2})}{r \cdot 1} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 23.2.4

Rewrite the expression.

$5 r^{3} + \frac{- 10 r^{2}}{1} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 23.2.5

Divide $- 10 r^{2}$ by $1$ .

$5 r^{3} - 10 r^{2} + \frac{16 r^{2}}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 24

Cancel the common factor of $16$ and $2$ .

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Step 24.1

Factor $2$ out of $16 r^{2}$ .

$5 r^{3} - 10 r^{2} + \frac{2 (8 r^{2})}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 24.2

Cancel the common factors.

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Step 24.2.1

Factor $2$ out of $2 r$ .

$5 r^{3} - 10 r^{2} + \frac{2 (8 r^{2})}{2 (r)} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 24.2.2

Cancel the common factor.

$5 r^{3} - 10 r^{2} + \frac{2 (8 r^{2})}{2 r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 24.2.3

Rewrite the expression.

$5 r^{3} - 10 r^{2} + \frac{8 r^{2}}{r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 25

Cancel the common factor of $r^{2}$ and $r$ .

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Step 25.1

Factor $r$ out of $8 r^{2}$ .

$5 r^{3} - 10 r^{2} + \frac{r (8 r)}{r} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 25.2

Cancel the common factors.

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Step 25.2.1

Raise $r$ to the power of $1$ .

$5 r^{3} - 10 r^{2} + \frac{r (8 r)}{r^{1}} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 25.2.2

Factor $r$ out of $r^{1}$ .

$5 r^{3} - 10 r^{2} + \frac{r (8 r)}{r \cdot 1} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 25.2.3

Cancel the common factor.

$5 r^{3} - 10 r^{2} + \frac{r (8 r)}{r \cdot 1} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 25.2.4

Rewrite the expression.

$5 r^{3} - 10 r^{2} + \frac{8 r}{1} + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 25.2.5

Divide $8 r$ by $1$ .

$5 r^{3} - 10 r^{2} + 8 r + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 26

Cancel the common factor of $r$ .

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Step 26.1

Cancel the common factor.

$5 r^{3} - 10 r^{2} + 8 r + \frac{- r}{2 r} + \frac{- 19}{2 r}$

Step 26.2

Rewrite the expression.

$5 r^{3} - 10 r^{2} + 8 r + \frac{- 1}{2} + \frac{- 19}{2 r}$

Step 27

Move the negative in front of the fraction.

$5 r^{3} - 10 r^{2} + 8 r - \frac{1}{2} + \frac{- 19}{2 r}$

Step 28

Move the negative in front of the fraction.

$5 r^{3} - 10 r^{2} + 8 r - \frac{1}{2} - \frac{19}{2 r}$