Trigonometry Examples

${(2 x - y)}^{4}$

Step 1

Use the Binomial Theorem.

${(2 x)}^{4} + 4 {(2 x)}^{3} (- y) + 6 {(2 x)}^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2

Simplify each term.

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Step 2.1

Apply the product rule to $2 x$ .

$2^{4} x^{4} + 4 {(2 x)}^{3} (- y) + 6 {(2 x)}^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.2

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

$16 x^{4} + 4 {(2 x)}^{3} (- y) + 6 {(2 x)}^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.3

Rewrite using the commutative property of multiplication.

$16 x^{4} + 4 \cdot - 1 {(2 x)}^{3} y + 6 {(2 x)}^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.4

Multiply $4$ by $- 1$ .

$16 x^{4} - 4 {(2 x)}^{3} y + 6 {(2 x)}^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.5

Apply the product rule to $2 x$ .

$16 x^{4} - 4 (2^{3} x^{3}) y + 6 {(2 x)}^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.6

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

$16 x^{4} - 4 (8 x^{3}) y + 6 {(2 x)}^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.7

Multiply $8$ by $- 4$ .

$16 x^{4} - 32 x^{3} y + 6 {(2 x)}^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.8

Apply the product rule to $2 x$ .

$16 x^{4} - 32 x^{3} y + 6 (2^{2} x^{2}) {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.9

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

$16 x^{4} - 32 x^{3} y + 6 (4 x^{2}) {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.10

Multiply $4$ by $6$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} {(- y)}^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.11

Apply the product rule to $- y$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} ({(- 1)}^{2} y^{2}) + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.12

Rewrite using the commutative property of multiplication.

$16 x^{4} - 32 x^{3} y + 24 \cdot {(- 1)}^{2} x^{2} y^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.13

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

$16 x^{4} - 32 x^{3} y + 24 \cdot 1 x^{2} y^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.14

Multiply $24$ by $1$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} + 4 (2 x) {(- y)}^{3} + {(- y)}^{4}$

Step 2.15

Multiply $2$ by $4$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} + 8 x {(- y)}^{3} + {(- y)}^{4}$

Step 2.16

Apply the product rule to $- y$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} + 8 x ({(- 1)}^{3} y^{3}) + {(- y)}^{4}$

Step 2.17

Rewrite using the commutative property of multiplication.

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} + 8 \cdot {(- 1)}^{3} x y^{3} + {(- y)}^{4}$

Step 2.18

Raise $- 1$ to the power of $3$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} + 8 \cdot - 1 x y^{3} + {(- y)}^{4}$

Step 2.19

Multiply $8$ by $- 1$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} - 8 x y^{3} + {(- y)}^{4}$

Step 2.20

Apply the product rule to $- y$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} - 8 x y^{3} + {(- 1)}^{4} y^{4}$

Step 2.21

Raise $- 1$ to the power of $4$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} - 8 x y^{3} + 1 y^{4}$

Step 2.22

Multiply $y^{4}$ by $1$ .

$16 x^{4} - 32 x^{3} y + 24 x^{2} y^{2} - 8 x y^{3} + y^{4}$