Precalculus Examples

${(x + 2 y)}^{5}$

Step 1

Use the Binomial Theorem.

$x^{5} + 5 x^{4} (2 y) + 10 x^{3} {(2 y)}^{2} + 10 x^{2} {(2 y)}^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2

Simplify each term.

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Step 2.1

Rewrite using the commutative property of multiplication.

$x^{5} + 5 \cdot 2 x^{4} y + 10 x^{3} {(2 y)}^{2} + 10 x^{2} {(2 y)}^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.2

Multiply $5$ by $2$ .

$x^{5} + 10 x^{4} y + 10 x^{3} {(2 y)}^{2} + 10 x^{2} {(2 y)}^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.3

Apply the product rule to $2 y$ .

$x^{5} + 10 x^{4} y + 10 x^{3} (2^{2} y^{2}) + 10 x^{2} {(2 y)}^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.4

Rewrite using the commutative property of multiplication.

$x^{5} + 10 x^{4} y + 10 \cdot 2^{2} x^{3} y^{2} + 10 x^{2} {(2 y)}^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.5

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

$x^{5} + 10 x^{4} y + 10 \cdot 4 x^{3} y^{2} + 10 x^{2} {(2 y)}^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.6

Multiply $10$ by $4$ .

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 10 x^{2} {(2 y)}^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.7

Apply the product rule to $2 y$ .

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 10 x^{2} (2^{3} y^{3}) + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.8

Rewrite using the commutative property of multiplication.

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 10 \cdot 2^{3} x^{2} y^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.9

Raise $2$ to the power of $3$ .

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 10 \cdot 8 x^{2} y^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.10

Multiply $10$ by $8$ .

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 80 x^{2} y^{3} + 5 x {(2 y)}^{4} + {(2 y)}^{5}$

Step 2.11

Apply the product rule to $2 y$ .

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 80 x^{2} y^{3} + 5 x (2^{4} y^{4}) + {(2 y)}^{5}$

Step 2.12

Rewrite using the commutative property of multiplication.

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 80 x^{2} y^{3} + 5 \cdot 2^{4} x y^{4} + {(2 y)}^{5}$

Step 2.13

Raise $2$ to the power of $4$ .

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 80 x^{2} y^{3} + 5 \cdot 16 x y^{4} + {(2 y)}^{5}$

Step 2.14

Multiply $5$ by $16$ .

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 80 x^{2} y^{3} + 80 x y^{4} + {(2 y)}^{5}$

Step 2.15

Apply the product rule to $2 y$ .

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 80 x^{2} y^{3} + 80 x y^{4} + 2^{5} y^{5}$

Step 2.16

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

$x^{5} + 10 x^{4} y + 40 x^{3} y^{2} + 80 x^{2} y^{3} + 80 x y^{4} + 32 y^{5}$