Apply the distributive property.

Apply the distributive property.

Apply the distributive property.

Simplify each term.

Multiply by .

Multiply by .

Rewrite using the commutative property of multiplication.

Multiply by .

Rewrite using the commutative property of multiplication.

Rewrite using the commutative property of multiplication.

Multiply by by adding the exponents.

Move .

Multiply by .

Add and .

Move .

Add and .

Add and .

Simplify (7x+y)(7x-y)