Finite Math Examples

$[\begin{array}{c} p & \ln (e) \\ 4^{\frac{5}{2}} & \sqrt{5} \end{array}]$

Step 1

The natural logarithm of $e$ is $1$ .

$[\begin{array}{c} p & 1 \\ 4^{\frac{5}{2}} & \sqrt{5} \end{array}]$

Step 2

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

$[\begin{array}{c} p & 1 \\ {(2^{2})}^{\frac{5}{2}} & \sqrt{5} \end{array}]$

Step 3

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

$[\begin{array}{c} p & 1 \\ 2^{2 (\frac{5}{2})} & \sqrt{5} \end{array}]$

Step 4

Cancel the common factor of $2$ .

Tap for more steps...

Step 4.1

Cancel the common factor.

$[\begin{array}{c} p & 1 \\ 2^{2 (\frac{5}{2})} & \sqrt{5} \end{array}]$

Step 4.2

Rewrite the expression.

$[\begin{array}{c} p & 1 \\ 2^{5} & \sqrt{5} \end{array}]$

Step 5

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

$[\begin{array}{c} p & 1 \\ 32 & \sqrt{5} \end{array}]$

Step 6

The inverse of a $2 \times 2$ matrix can be found using the formula $\frac{1}{a d - b c} [\begin{array}{c} d & - b \\ - c & a \end{array}]$ where $a d - b c$ is the determinant.

Step 7

Find the determinant.

Tap for more steps...

Step 7.1

The determinant of a $2 \times 2$ matrix can be found using the formula $| \begin{array}{c} a & b \\ c & d \end{array} | = a d - c b$ .

$p \sqrt{5} - 32 \cdot 1$

Step 7.2

Multiply $- 32$ by $1$ .

$p \sqrt{5} - 32$

Step 8

Since the determinant is non-zero, the inverse exists.

Step 9

Substitute the known values into the formula for the inverse.

$\frac{1}{p \sqrt{5} - 32} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 10

Multiply $\frac{1}{p \sqrt{5} - 32}$ by $\frac{p \sqrt{5} + 32}{p \sqrt{5} + 32}$ .

$\frac{1}{p \sqrt{5} - 32} \cdot \frac{p \sqrt{5} + 32}{p \sqrt{5} + 32} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 11

Multiply $\frac{1}{p \sqrt{5} - 32}$ by $\frac{p \sqrt{5} + 32}{p \sqrt{5} + 32}$ .

$\frac{p \sqrt{5} + 32}{(p \sqrt{5} - 32) (p \sqrt{5} + 32)} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 12

Expand the denominator using the FOIL method.

$\frac{p \sqrt{5} + 32}{p^{2} {\sqrt{5}}^{2} + p \sqrt{5} \cdot 32 - 32 (p \sqrt{5}) - 1024} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 13

Simplify.

Tap for more steps...

Step 13.1

Rewrite ${\sqrt{5}}^{2}$ as $5$ .

Tap for more steps...

Step 13.1.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{5}$ as $5^{\frac{1}{2}}$ .

$\frac{p \sqrt{5} + 32}{p^{2} {(5^{\frac{1}{2}})}^{2} - 1024} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 13.1.2

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

$\frac{p \sqrt{5} + 32}{p^{2} \cdot 5^{\frac{1}{2} \cdot 2} - 1024} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 13.1.3

Combine $\frac{1}{2}$ and $2$ .

$\frac{p \sqrt{5} + 32}{p^{2} \cdot 5^{\frac{2}{2}} - 1024} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 13.1.4

Cancel the common factor of $2$ .

Tap for more steps...

Step 13.1.4.1

Cancel the common factor.

$\frac{p \sqrt{5} + 32}{p^{2} \cdot 5^{\frac{2}{2}} - 1024} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 13.1.4.2

Rewrite the expression.

$\frac{p \sqrt{5} + 32}{p^{2} \cdot 5^{1} - 1024} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 13.1.5

Evaluate the exponent.

$\frac{p \sqrt{5} + 32}{p^{2} \cdot 5 - 1024} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 13.2

Move $5$ to the left of $p^{2}$ .

$\frac{p \sqrt{5} + 32}{5 p^{2} - 1024} [\begin{array}{c} \sqrt{5} & - 1 \\ - 32 & p \end{array}]$

Step 14

Multiply $\frac{p \sqrt{5} + 32}{5 p^{2} - 1024}$ by each element of the matrix.

$[\begin{array}{c} \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \sqrt{5} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15

Simplify each element in the matrix.

Tap for more steps...

Step 15.1

Combine $\frac{p \sqrt{5} + 32}{5 p^{2} - 1024}$ and $\sqrt{5}$ .

$[\begin{array}{c} \frac{(p \sqrt{5} + 32) \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.2

Apply the distributive property.

$[\begin{array}{c} \frac{p \sqrt{5} \sqrt{5} + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.3

Multiply $p \sqrt{5} \sqrt{5}$ .

Tap for more steps...

Step 15.3.1

Raise $\sqrt{5}$ to the power of $1$ .

$[\begin{array}{c} \frac{p ({\sqrt{5}}^{1} \sqrt{5}) + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.3.2

Raise $\sqrt{5}$ to the power of $1$ .

$[\begin{array}{c} \frac{p ({\sqrt{5}}^{1} {\sqrt{5}}^{1}) + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.3.3

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

$[\begin{array}{c} \frac{p {\sqrt{5}}^{1 + 1} + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.3.4

Add $1$ and $1$ .

$[\begin{array}{c} \frac{p {\sqrt{5}}^{2} + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.4

Simplify each term.

Tap for more steps...

Step 15.4.1

Rewrite ${\sqrt{5}}^{2}$ as $5$ .

Tap for more steps...

Step 15.4.1.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{5}$ as $5^{\frac{1}{2}}$ .

$[\begin{array}{c} \frac{p {(5^{\frac{1}{2}})}^{2} + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.4.1.2

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

$[\begin{array}{c} \frac{p \cdot 5^{\frac{1}{2} \cdot 2} + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.4.1.3

Combine $\frac{1}{2}$ and $2$ .

$[\begin{array}{c} \frac{p \cdot 5^{\frac{2}{2}} + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.4.1.4

Cancel the common factor of $2$ .

Tap for more steps...

Step 15.4.1.4.1

Cancel the common factor.

Step 15.4.1.4.2

Rewrite the expression.

$[\begin{array}{c} \frac{p \cdot 5^{1} + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.4.1.5

Evaluate the exponent.

$[\begin{array}{c} \frac{p \cdot 5 + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.4.2

Move $5$ to the left of $p$ .

$[\begin{array}{c} \frac{5 p + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 1 \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.5

Combine $\frac{p \sqrt{5} + 32}{5 p^{2} - 1024}$ and $- 1$ .

$[\begin{array}{c} \frac{5 p + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{(p \sqrt{5} + 32) \cdot - 1}{5 p^{2} - 1024} \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.6

Move $- 1$ to the left of $p \sqrt{5} + 32$ .

$[\begin{array}{c} \frac{5 p + 32 \sqrt{5}}{5 p^{2} - 1024} & \frac{- 1 \cdot (p \sqrt{5} + 32)}{5 p^{2} - 1024} \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.7

Move the negative in front of the fraction.

$[\begin{array}{c} \frac{5 p + 32 \sqrt{5}}{5 p^{2} - 1024} & - \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \\ \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \cdot - 32 & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.8

Combine $\frac{p \sqrt{5} + 32}{5 p^{2} - 1024}$ and $- 32$ .

$[\begin{array}{c} \frac{5 p + 32 \sqrt{5}}{5 p^{2} - 1024} & - \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \\ \frac{(p \sqrt{5} + 32) \cdot - 32}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.9

Move $- 32$ to the left of $p \sqrt{5} + 32$ .

$[\begin{array}{c} \frac{5 p + 32 \sqrt{5}}{5 p^{2} - 1024} & - \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \\ \frac{- 32 \cdot (p \sqrt{5} + 32)}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.10

Move the negative in front of the fraction.

$[\begin{array}{c} \frac{5 p + 32 \sqrt{5}}{5 p^{2} - 1024} & - \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \\ - \frac{32 (p \sqrt{5} + 32)}{5 p^{2} - 1024} & \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} p \end{array}]$

Step 15.11

Combine $\frac{p \sqrt{5} + 32}{5 p^{2} - 1024}$ and $p$ .

$[\begin{array}{c} \frac{5 p + 32 \sqrt{5}}{5 p^{2} - 1024} & - \frac{p \sqrt{5} + 32}{5 p^{2} - 1024} \\ - \frac{32 (p \sqrt{5} + 32)}{5 p^{2} - 1024} & \frac{(p \sqrt{5} + 32) p}{5 p^{2} - 1024} \end{array}]$