Simplify: (4x-y)(4x+y)

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Simplify: (4x-y)(4x+y)

Mathematics
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At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.

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You need to foil. F = 4x * 4x = 16x^2 O = 4x* y = 4xy I = -y * 4x = -4xy L = -y * y = -y^2 Add like terms and you get 16x^2 - y^2 Hint... if you have the exact same first terms and last terms... (4x y)(4x y) and you have one + sign and one - sign you can get the answer by multiplying the F and the L only because the O and I will ALWAYS cancel out. Be careful though, you can only do that when they are identical with one + sign and one - sign.
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