\"\"

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The expression is \"\".

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The FOIL method can be used to multiply the complex numbers.

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Foil method: the product of two binomials is the sum of the products of the First terms,

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the Outer terms, the Inner terms and the Last terms.

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The word FOIL is an acronym for the four terms of the product.

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\"\"

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\"\"

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Multiply the complex numbers using FOIL method

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\"\"

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\"\"            (Multiply: \"\")

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Combine like terms using distributive property: ac + bc = (a + b)c.

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\"\"              (Multiply: \"\")

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\"\"

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Apply commutative property of addition: a + b = b + a.

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\"\"

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\"\"                              (Add: 12 + 7 = 17)\"\"

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The simplified expression is \"\".