Solve by Factoring 6/(x^2)-40/x=14

$\frac{6}{x^{2}} - \frac{40}{x} = 14$

Step 1

Subtract $14$ from both sides of the equation.

$\frac{6}{x^{2}} - \frac{40}{x} - 14 = 0$

Step 2

Reorder terms.

$- \frac{40}{x} + \frac{6}{x^{2}} - 14 = 0$

Step 3

To write $- \frac{40}{x}$ as a fraction with a common denominator, multiply by $\frac{x}{x}$ .

$- \frac{40}{x} \cdot \frac{x}{x} + \frac{6}{x^{2}} - 14 = 0$

Step 4

Write each expression with a common denominator of $x^{2}$ , by multiplying each by an appropriate factor of $1$ .

Multiply $\frac{40}{x}$ by $\frac{x}{x}$ .

$- \frac{40 x}{x \cdot x} + \frac{6}{x^{2}} - 14 = 0$

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

$- \frac{40 x}{x \cdot x} + \frac{6}{x^{2}} - 14 = 0$

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

$- \frac{40 x}{x \cdot x} + \frac{6}{x^{2}} - 14 = 0$

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

$- \frac{40 x}{x^{1 + 1}} + \frac{6}{x^{2}} - 14 = 0$

Add $1$ and $1$ .

$- \frac{40 x}{x^{2}} + \frac{6}{x^{2}} - 14 = 0$

Step 5

Combine the numerators over the common denominator.

$\frac{- 40 x + 6}{x^{2}} - 14 = 0$

Step 6

Factor $2$ out of $- 40 x + 6$ .

Factor $2$ out of $- 40 x$ .

$\frac{2 (- 20 x) + 6}{x^{2}} - 14 = 0$

Factor $2$ out of $6$ .

$\frac{2 (- 20 x) + 2 (3)}{x^{2}} - 14 = 0$

Factor $2$ out of $2 (- 20 x) + 2 (3)$ .

$\frac{2 (- 20 x + 3)}{x^{2}} - 14 = 0$

Step 7

To write $- 14$ as a fraction with a common denominator, multiply by $\frac{x^{2}}{x^{2}}$ .

$\frac{2 (- 20 x + 3)}{x^{2}} - 14 \cdot \frac{x^{2}}{x^{2}} = 0$

Step 8

Combine $- 14$ and $\frac{x^{2}}{x^{2}}$ .

$\frac{2 (- 20 x + 3)}{x^{2}} + \frac{- 14 x^{2}}{x^{2}} = 0$

Step 9

Combine the numerators over the common denominator.

$\frac{2 (- 20 x + 3) - 14 x^{2}}{x^{2}} = 0$

Step 10

Simplify the numerator.

Factor $2$ out of $2 (- 20 x + 3) - 14 x^{2}$ .

Factor $2$ out of $- 14 x^{2}$ .

$\frac{2 (- 20 x + 3) + 2 (- 7 x^{2})}{x^{2}} = 0$

Factor $2$ out of $2 (- 20 x + 3) + 2 (- 7 x^{2})$ .

$\frac{2 (- 20 x + 3 - 7 x^{2})}{x^{2}} = 0$

Factor.

Factor by grouping.

Reorder terms.

$\frac{2 (- 7 x^{2} - 20 x + 3)}{x^{2}} = 0$

For a polynomial of the form $a x^{2} + b x + c$ , rewrite the middle term as a sum of two terms whose product is $a \cdot c = - 7 \cdot 3 = - 21$ and whose sum is $b = - 20$ .

Factor $- 20$ out of $- 20 x$ .

$\frac{2 (- 7 x^{2} - 20 x + 3)}{x^{2}} = 0$

Rewrite $- 20$ as $1$ plus $- 21$

$\frac{2 (- 7 x^{2} + (1 - 21) x + 3)}{x^{2}} = 0$

Apply the distributive property.

$\frac{2 (- 7 x^{2} + 1 x - 21 x + 3)}{x^{2}} = 0$

Multiply $x$ by $1$ .

$\frac{2 (- 7 x^{2} + x - 21 x + 3)}{x^{2}} = 0$

Factor out the greatest common factor from each group.

Group the first two terms and the last two terms.

$\frac{2 ((- 7 x^{2} + x) - 21 x + 3)}{x^{2}} = 0$

Factor out the greatest common factor (GCF) from each group.

$\frac{2 (x (- 7 x + 1) + 3 (- 7 x + 1))}{x^{2}} = 0$

Factor the polynomial by factoring out the greatest common factor, $- 7 x + 1$ .

$\frac{2 ((- 7 x + 1) (x + 3))}{x^{2}} = 0$

Remove unnecessary parentheses.

$\frac{2 (- 7 x + 1) (x + 3)}{x^{2}} = 0$

Step 11

Set the numerator equal to zero.

$2 (- 7 x + 1) (x + 3) = 0$

Step 12

Solve the equation for $x$ .

If any individual factor on the left side of the equation is equal to $0$ , the entire expression will be equal to $0$ .

$- 7 x + 1 = 0$

$x + 3 = 0$

Set $- 7 x + 1$ equal to $0$ and solve for $x$ .

Set $- 7 x + 1$ equal to $0$ .

$- 7 x + 1 = 0$

Solve $- 7 x + 1 = 0$ for $x$ .

Subtract $1$ from both sides of the equation.

$- 7 x = - 1$

Divide each term in $- 7 x = - 1$ by $- 7$ and simplify.

Divide each term in $- 7 x = - 1$ by $- 7$ .

$\frac{- 7 x}{- 7} = \frac{- 1}{- 7}$

Simplify the left side.

Cancel the common factor of $- 7$ .

Cancel the common factor.

$\frac{- 7 x}{- 7} = \frac{- 1}{- 7}$

Divide $x$ by $1$ .

$x = \frac{- 1}{- 7}$

Simplify the right side.

Dividing two negative values results in a positive value.

$x = \frac{1}{7}$

Set $x + 3$ equal to $0$ and solve for $x$ .

Set $x + 3$ equal to $0$ .

$x + 3 = 0$

Subtract $3$ from both sides of the equation.

$x = - 3$

The final solution is all the values that make $2 (- 7 x + 1) (x + 3) = 0$ true.

$x = \frac{1}{7}, - 3$

Solve by Factoring 6/(x^2)-40/x=14

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