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Simplifying ((x + y) + -4)((x + y) + 4) = 0 Remove parenthesis around (x + y) (x + y + -4)((x + y) + 4) = 0 Reorder the terms: (-4 + x + y)((x + y) + 4) = 0 Remove parenthesis around (x + y) (-4 + x + y)(x + y + 4) = 0 Reorder the terms: (-4 + x + y)(4 + x + y) = 0 Multiply (-4 + x + y) * (4 + x + y) (-4(4 + x + y) + x(4 + x + y) + y(4 + x + y)) = 0 ((4 * -4 + x * -4 + y * -4) + x(4 + x + y) + y(4 + x + y)) = 0 ((-16 + -4x + -4y) + x(4 + x + y) + y(4 + x + y)) = 0 (-16 + -4x + -4y + (4 * x + x * x + y * x) + y(4 + x + y)) = 0 Reorder the terms: (-16 + -4x + -4y + (4x + xy + x2) + y(4 + x + y)) = 0 (-16 + -4x + -4y + (4x + xy + x2) + y(4 + x + y)) = 0 (-16 + -4x + -4y + 4x + xy + x2 + (4 * y + x * y + y * y)) = 0 Reorder the terms: (-16 + -4x + -4y + 4x + xy + x2 + (xy + 4y + y2)) = 0 (-16 + -4x + -4y + 4x + xy + x2 + (xy + 4y + y2)) = 0 Reorder the terms: (-16 + -4x + 4x + xy + xy + x2 + -4y + 4y + y2) = 0 Combine like terms: -4x + 4x = 0 (-16 + 0 + xy + xy + x2 + -4y + 4y + y2) = 0 (-16 + xy + xy + x2 + -4y + 4y + y2) = 0 Combine like terms: xy + xy = 2xy (-16 + 2xy + x2 + -4y + 4y + y2) = 0 Combine like terms: -4y + 4y = 0 (-16 + 2xy + x2 + 0 + y2) = 0 (-16 + 2xy + x2 + y2) = 0 Solving -16 + 2xy + x2 + y2 = 0 Solving for variable 'x'. The solution to this equation could not be determined.
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