Simplify (2x-3y)^3-(2x+3y)^3

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

Step 1

Simplify each term.

Use the Binomial Theorem.

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

Simplify each term.

Apply the product rule to

$2 x$ .

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

Raise

$2$ to the power of

$3$ .

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

Rewrite using the commutative property of multiplication.

$8 x^{3} + 3 \cdot - 3 {(2 x)}^{2} y + 3 (2 x) {(- 3 y)}^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Multiply

$3$ by

$- 3$ .

$8 x^{3} - 9 {(2 x)}^{2} y + 3 (2 x) {(- 3 y)}^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Apply the product rule to

$2 x$ .

$8 x^{3} - 9 (2^{2} x^{2}) y + 3 (2 x) {(- 3 y)}^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Raise

$2$ to the power of

$2$ .

$8 x^{3} - 9 (4 x^{2}) y + 3 (2 x) {(- 3 y)}^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Multiply

$4$ by

$- 9$ .

$8 x^{3} - 36 x^{2} y + 3 (2 x) {(- 3 y)}^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Multiply

$2$ by

$3$ .

$8 x^{3} - 36 x^{2} y + 6 x {(- 3 y)}^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Apply the product rule to

$- 3 y$ .

$8 x^{3} - 36 x^{2} y + 6 x ({(- 3)}^{2} y^{2}) + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Rewrite using the commutative property of multiplication.

$8 x^{3} - 36 x^{2} y + 6 \cdot {(- 3)}^{2} x y^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Raise

$- 3$ to the power of

$2$ .

$8 x^{3} - 36 x^{2} y + 6 \cdot 9 x y^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Multiply

$6$ by

$9$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} + {(- 3 y)}^{3} - {(2 x + 3 y)}^{3}$

Apply the product rule to

$- 3 y$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} + {(- 3)}^{3} y^{3} - {(2 x + 3 y)}^{3}$

Raise

$- 3$ to the power of

$3$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - {(2 x + 3 y)}^{3}$

Use the Binomial Theorem.

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - ({(2 x)}^{3} + 3 {(2 x)}^{2} (3 y) + 3 (2 x) {(3 y)}^{2} + {(3 y)}^{3})$

Simplify each term.

Apply the product rule to

$2 x$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (2^{3} x^{3} + 3 {(2 x)}^{2} (3 y) + 3 (2 x) {(3 y)}^{2} + {(3 y)}^{3})$

Raise

$2$ to the power of

$3$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 3 {(2 x)}^{2} (3 y) + 3 (2 x) {(3 y)}^{2} + {(3 y)}^{3})$

Rewrite using the commutative property of multiplication.

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 3 \cdot 3 {(2 x)}^{2} y + 3 (2 x) {(3 y)}^{2} + {(3 y)}^{3})$

Multiply

$3$ by

$3$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 9 {(2 x)}^{2} y + 3 (2 x) {(3 y)}^{2} + {(3 y)}^{3})$

Apply the product rule to

$2 x$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 9 (2^{2} x^{2}) y + 3 (2 x) {(3 y)}^{2} + {(3 y)}^{3})$

Raise

$2$ to the power of

$2$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 9 (4 x^{2}) y + 3 (2 x) {(3 y)}^{2} + {(3 y)}^{3})$

Multiply

$4$ by

$9$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 36 x^{2} y + 3 (2 x) {(3 y)}^{2} + {(3 y)}^{3})$

Multiply

$2$ by

$3$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 36 x^{2} y + 6 x {(3 y)}^{2} + {(3 y)}^{3})$

Apply the product rule to

$3 y$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 36 x^{2} y + 6 x (3^{2} y^{2}) + {(3 y)}^{3})$

Rewrite using the commutative property of multiplication.

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 36 x^{2} y + 6 \cdot 3^{2} x y^{2} + {(3 y)}^{3})$

Raise

$3$ to the power of

$2$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 36 x^{2} y + 6 \cdot 9 x y^{2} + {(3 y)}^{3})$

Multiply

$6$ by

$9$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 36 x^{2} y + 54 x y^{2} + {(3 y)}^{3})$

Apply the product rule to

$3 y$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 36 x^{2} y + 54 x y^{2} + 3^{3} y^{3})$

Raise

$3$ to the power of

$3$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3} + 36 x^{2} y + 54 x y^{2} + 27 y^{3})$

Apply the distributive property.

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - (8 x^{3}) - (36 x^{2} y) - (54 x y^{2}) - (27 y^{3})$

Simplify.

Multiply

$8$ by

$- 1$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - 8 x^{3} - (36 x^{2} y) - (54 x y^{2}) - (27 y^{3})$

Multiply

$36$ by

$- 1$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - 8 x^{3} - 36 (x^{2} y) - (54 x y^{2}) - (27 y^{3})$

Multiply

$54$ by

$- 1$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - 8 x^{3} - 36 (x^{2} y) - 54 (x y^{2}) - (27 y^{3})$

Multiply

$27$ by

$- 1$ .

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - 8 x^{3} - 36 (x^{2} y) - 54 (x y^{2}) - 27 y^{3}$

Remove parentheses.

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - 8 x^{3} - 36 x^{2} y - 54 x y^{2} - 27 y^{3}$

Step 2

Simplify by adding terms.

Combine the opposite terms in

$8 x^{3} - 36 x^{2} y + 54 x y^{2} - 27 y^{3} - 8 x^{3} - 36 x^{2} y - 54 x y^{2} - 27 y^{3}$ .

Subtract

$8 x^{3}$ from

$8 x^{3}$ .

$- 36 x^{2} y + 54 x y^{2} - 27 y^{3} + 0 - 36 x^{2} y - 54 x y^{2} - 27 y^{3}$

Add

$- 36 x^{2} y + 54 x y^{2} - 27 y^{3}$ and

$0$ .

$- 36 x^{2} y + 54 x y^{2} - 27 y^{3} - 36 x^{2} y - 54 x y^{2} - 27 y^{3}$

Subtract

$54 x y^{2}$ from

$54 x y^{2}$ .

$- 36 x^{2} y - 27 y^{3} - 36 x^{2} y + 0 - 27 y^{3}$

Add

$- 36 x^{2} y - 27 y^{3} - 36 x^{2} y$ and

$0$ .

$- 36 x^{2} y - 27 y^{3} - 36 x^{2} y - 27 y^{3}$

Subtract

$36 x^{2} y$ from

$- 36 x^{2} y$ .

$- 27 y^{3} - 72 x^{2} y - 27 y^{3}$

Subtract

$27 y^{3}$ from

$- 27 y^{3}$ .

$- 54 y^{3} - 72 x^{2} y$

Simplify (2x-3y)^3-(2x+3y)^3

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