Use the Binomial Theorem.

Apply the product rule to .

Raise to the power of .

Rewrite using the commutative property of multiplication.

Multiply by .

Apply the product rule to .

Raise to the power of .

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Raise to the power of .

Multiply by .

Apply the product rule to .

Rewrite using the commutative property of multiplication.

Raise to the power of .

Multiply by .

Apply the product rule to .

Raise to the power of .

Multiply by .

Apply the product rule to .

Rewrite using the commutative property of multiplication.

Raise to the power of .

Multiply by .

Apply the product rule to .

Raise to the power of .

Multiply by .

Apply the product rule to .

Rewrite using the commutative property of multiplication.

Raise to the power of .

Multiply by .

Apply the product rule to .

Raise to the power of .

Multiply by .

Apply the product rule to .

Rewrite using the commutative property of multiplication.

Raise to the power of .

Multiply by .

Multiply by .

Apply the product rule to .

Rewrite using the commutative property of multiplication.

Raise to the power of .

Multiply by .

Apply the product rule to .

Raise to the power of .

Expand (3x-3y)^7