I need step by step examples please.

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please help me to solve for the x and y value or help me by telling on hoe to start solving it.

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Do you use a different version of FOIL? Do you just multiply 8x4x(-9)? or do you multiply 8iX4i which equals 32 but then mutliply it by -1 because i^2=-1 so you'd have -32, and then multiply...

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"i" representing the square root of negative 1