Precalculus Examples

${(5 p + 1)}^{4}$

Step 1

Use the binomial expansion theorem to find each term. The binomial theorem states ${(a + b)}^{n} = \sum_{k = 0}^{n} n C k \cdot (a^{n - k} b^{k})$ .

$\sum_{k = 0}^{4} \frac{4!}{(4 - k)! k!} \cdot {(5 p)}^{4 - k} \cdot {(1)}^{k}$

Step 2

Expand the summation.

$\frac{4!}{(4 - 0)! 0!} \cdot {(5 p)}^{4 - 0} \cdot {(1)}^{0} + \frac{4!}{(4 - 1)! 1!} \cdot {(5 p)}^{4 - 1} \cdot {(1)}^{1} + \frac{4!}{(4 - 2)! 2!} \cdot {(5 p)}^{4 - 2} \cdot {(1)}^{2} + \frac{4!}{(4 - 3)! 3!} \cdot {(5 p)}^{4 - 3} \cdot {(1)}^{3} + \frac{4!}{(4 - 4)! 4!} \cdot {(5 p)}^{4 - 4} \cdot {(1)}^{4}$

Step 3

Simplify the exponents for each term of the expansion.

$1 \cdot {(5 p)}^{4} \cdot {(1)}^{0} + 4 \cdot {(5 p)}^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4

Simplify each term.

Tap for more steps...

Step 4.1

Multiply $1$ by ${(1)}^{0}$ by adding the exponents.

Tap for more steps...

Step 4.1.1

Move ${(1)}^{0}$ .

${(1)}^{0} \cdot 1 \cdot {(5 p)}^{4} + 4 \cdot {(5 p)}^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.1.2

Multiply ${(1)}^{0}$ by $1$ .

Tap for more steps...

Step 4.1.2.1

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

${(1)}^{0} \cdot 1^{1} \cdot {(5 p)}^{4} + 4 \cdot {(5 p)}^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.1.2.2

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

$1^{0 + 1} \cdot {(5 p)}^{4} + 4 \cdot {(5 p)}^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.1.3

Add $0$ and $1$ .

$1^{1} \cdot {(5 p)}^{4} + 4 \cdot {(5 p)}^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.2

Simplify $1^{1} \cdot {(5 p)}^{4}$ .

${(5 p)}^{4} + 4 \cdot {(5 p)}^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.3

Apply the product rule to $5 p$ .

$5^{4} p^{4} + 4 \cdot {(5 p)}^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.4

Raise $5$ to the power of $4$ .

$625 p^{4} + 4 \cdot {(5 p)}^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.5

Apply the product rule to $5 p$ .

$625 p^{4} + 4 \cdot (5^{3} p^{3}) \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.6

Raise $5$ to the power of $3$ .

$625 p^{4} + 4 \cdot (125 p^{3}) \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.7

Multiply $125$ by $4$ .

$625 p^{4} + 500 p^{3} \cdot {(1)}^{1} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.8

Evaluate the exponent.

$625 p^{4} + 500 p^{3} \cdot 1 + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.9

Multiply $500$ by $1$ .

$625 p^{4} + 500 p^{3} + 6 \cdot {(5 p)}^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.10

Apply the product rule to $5 p$ .

$625 p^{4} + 500 p^{3} + 6 \cdot (5^{2} p^{2}) \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.11

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

$625 p^{4} + 500 p^{3} + 6 \cdot (25 p^{2}) \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.12

Multiply $25$ by $6$ .

$625 p^{4} + 500 p^{3} + 150 p^{2} \cdot {(1)}^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.13

One to any power is one.

$625 p^{4} + 500 p^{3} + 150 p^{2} \cdot 1 + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.14

Multiply $150$ by $1$ .

$625 p^{4} + 500 p^{3} + 150 p^{2} + 4 \cdot {(5 p)}^{1} \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.15

Simplify.

$625 p^{4} + 500 p^{3} + 150 p^{2} + 4 \cdot (5 p) \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.16

Multiply $5$ by $4$ .

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p \cdot {(1)}^{3} + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.17

One to any power is one.

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p \cdot 1 + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.18

Multiply $20$ by $1$ .

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p + 1 \cdot {(5 p)}^{0} \cdot {(1)}^{4}$

Step 4.19

Multiply $1$ by ${(1)}^{4}$ by adding the exponents.

Tap for more steps...

Step 4.19.1

Move ${(1)}^{4}$ .

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p + {(1)}^{4} \cdot 1 \cdot {(5 p)}^{0}$

Step 4.19.2

Multiply ${(1)}^{4}$ by $1$ .

Tap for more steps...

Step 4.19.2.1

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

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p + {(1)}^{4} \cdot 1^{1} \cdot {(5 p)}^{0}$

Step 4.19.2.2

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

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p + 1^{4 + 1} \cdot {(5 p)}^{0}$

Step 4.19.3

Add $4$ and $1$ .

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p + 1^{5} \cdot {(5 p)}^{0}$

Step 4.20

Simplify $1^{5} \cdot {(5 p)}^{0}$ .

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p + 1^{5}$

Step 4.21

One to any power is one.

$625 p^{4} + 500 p^{3} + 150 p^{2} + 20 p + 1$