Solve by Factoring x-4 square root of 2x=10

$x - 4 \sqrt{2 x} = 10$

Step 1

Subtract $10$ from both sides of the equation.

$x - 4 \sqrt{2 x} - 10 = 0$

Step 2

Move all terms not containing $- 4 \sqrt{2 x}$ to the right side of the equation.

Subtract $x$ from both sides of the equation.

$- 4 \sqrt{2 x} - 10 = - x$

Add $10$ to both sides of the equation.

$- 4 \sqrt{2 x} = - x + 10$

Step 3

To remove the radical on the left side of the equation, square both sides of the equation.

${(- 4 \sqrt{2 x})}^{2} = {(- x + 10)}^{2}$

Step 4

Simplify each side of the equation.

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{2 x}$ as ${(2 x)}^{\frac{1}{2}}$ .

${(- 4 {(2 x)}^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Simplify the left side.

Simplify ${(- 4 {(2 x)}^{\frac{1}{2}})}^{2}$ .

Apply the product rule to $2 x$ .

${(- 4 (2^{\frac{1}{2}} x^{\frac{1}{2}}))}^{2} = {(- x + 10)}^{2}$

Multiply $- 4 \cdot 2^{\frac{1}{2}}$ .

Factor out negative.

${(- (4 \cdot 2^{\frac{1}{2}}) x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Rewrite $4$ as $2^{2}$ .

${(- (2^{2} \cdot 2^{\frac{1}{2}}) x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

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

${(- 2^{2 + \frac{1}{2}} x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

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

${(- 2^{2 \cdot \frac{2}{2} + \frac{1}{2}} x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Combine $2$ and $\frac{2}{2}$ .

${(- 2^{\frac{2 \cdot 2}{2} + \frac{1}{2}} x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Combine the numerators over the common denominator.

${(- 2^{\frac{2 \cdot 2 + 1}{2}} x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Simplify the numerator.

Multiply $2$ by $2$ .

${(- 2^{\frac{4 + 1}{2}} x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Add $4$ and $1$ .

${(- 2^{\frac{5}{2}} x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Use the power rule ${(a b)}^{n} = a^{n} b^{n}$ to distribute the exponent.

Apply the product rule to $- 2^{\frac{5}{2}} x^{\frac{1}{2}}$ .

${(- 2^{\frac{5}{2}})}^{2} {(x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Apply the product rule to $- 2^{\frac{5}{2}}$ .

${(- 1)}^{2} {(2^{\frac{5}{2}})}^{2} {(x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Raise $- 1$ to the power of $2$ .

$1 {(2^{\frac{5}{2}})}^{2} {(x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Multiply ${(2^{\frac{5}{2}})}^{2}$ by $1$ .

${(2^{\frac{5}{2}})}^{2} {(x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Multiply the exponents in ${(2^{\frac{5}{2}})}^{2}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$2^{\frac{5}{2} \cdot 2} {(x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Cancel the common factor of $2$ .

Cancel the common factor.

$2^{\frac{5}{2} \cdot 2} {(x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Rewrite the expression.

$2^{5} {(x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Raise $2$ to the power of $5$ .

$32 {(x^{\frac{1}{2}})}^{2} = {(- x + 10)}^{2}$

Multiply the exponents in ${(x^{\frac{1}{2}})}^{2}$ .

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$32 x^{\frac{1}{2} \cdot 2} = {(- x + 10)}^{2}$

Cancel the common factor of $2$ .

Cancel the common factor.

$32 x^{\frac{1}{2} \cdot 2} = {(- x + 10)}^{2}$

Rewrite the expression.

$32 x^{1} = {(- x + 10)}^{2}$

Simplify.

$32 x = {(- x + 10)}^{2}$

Simplify the right side.

Simplify ${(- x + 10)}^{2}$ .

Rewrite ${(- x + 10)}^{2}$ as $(- x + 10) (- x + 10)$ .

$32 x = (- x + 10) (- x + 10)$

Expand $(- x + 10) (- x + 10)$ using the FOIL Method.

Apply the distributive property.

$32 x = - x (- x + 10) + 10 (- x + 10)$

Apply the distributive property.

$32 x = - x (- x) - x \cdot 10 + 10 (- x + 10)$

Apply the distributive property.

$32 x = - x (- x) - x \cdot 10 + 10 (- x) + 10 \cdot 10$

Simplify and combine like terms.

Simplify each term.

Rewrite using the commutative property of multiplication.

$32 x = - 1 \cdot - 1 x \cdot x - x \cdot 10 + 10 (- x) + 10 \cdot 10$

Multiply $x$ by $x$ by adding the exponents.

Move $x$ .

$32 x = - 1 \cdot - 1 (x \cdot x) - x \cdot 10 + 10 (- x) + 10 \cdot 10$

Multiply $x$ by $x$ .

$32 x = - 1 \cdot - 1 x^{2} - x \cdot 10 + 10 (- x) + 10 \cdot 10$

Multiply $- 1$ by $- 1$ .

$32 x = 1 x^{2} - x \cdot 10 + 10 (- x) + 10 \cdot 10$

Multiply $x^{2}$ by $1$ .

$32 x = x^{2} - x \cdot 10 + 10 (- x) + 10 \cdot 10$

Multiply $10$ by $- 1$ .

$32 x = x^{2} - 10 x + 10 (- x) + 10 \cdot 10$

Multiply $- 1$ by $10$ .

$32 x = x^{2} - 10 x - 10 x + 10 \cdot 10$

Multiply $10$ by $10$ .

$32 x = x^{2} - 10 x - 10 x + 100$

Subtract $10 x$ from $- 10 x$ .

$32 x = x^{2} - 20 x + 100$

Step 5

Solve for $x$ .

Since $x$ is on the right side of the equation, switch the sides so it is on the left side of the equation.

$x^{2} - 20 x + 100 = 32 x$

Move all terms containing $x$ to the left side of the equation.

Subtract $32 x$ from both sides of the equation.

$x^{2} - 20 x + 100 - 32 x = 0$

Subtract $32 x$ from $- 20 x$ .

$x^{2} - 52 x + 100 = 0$

Factor $x^{2} - 52 x + 100$ using the AC method.

Consider the form $x^{2} + b x + c$ . Find a pair of integers whose product is $c$ and whose sum is $b$ . In this case, whose product is $100$ and whose sum is $- 52$ .

$- 50, - 2$

Write the factored form using these integers.

$(x - 50) (x - 2) = 0$

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

$x - 50 = 0$

$x - 2 = 0$

Set $x - 50$ equal to $0$ and solve for $x$ .

Set $x - 50$ equal to $0$ .

$x - 50 = 0$

Add $50$ to both sides of the equation.

$x = 50$

Set $x - 2$ equal to $0$ and solve for $x$ .

Set $x - 2$ equal to $0$ .

$x - 2 = 0$

Add $2$ to both sides of the equation.

$x = 2$

The final solution is all the values that make $(x - 50) (x - 2) = 0$ true.

$x = 50, 2$

Step 6

Exclude the solutions that do not make $x - 4 \sqrt{2 x} - 10 = 0$ true.

$x = 50$

Solve by Factoring x-4 square root of 2x=10

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