Trigonometry 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 $5$ .

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