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Simplifying f(x) + f(y) + -1f(x + y) = xy Multiply f * x fx + f(y) + -1f(x + y) = xy Multiply f * y fx + fy + -1f(x + y) = xy fx + fy + (x * -1f + y * -1f) = xy fx + fy + (-1fx + -1fy) = xy Reorder the terms: fx + -1fx + fy + -1fy = xy Combine like terms: fx + -1fx = 0 0 + fy + -1fy = xy fy + -1fy = xy Combine like terms: fy + -1fy = 0 0 = xy Solving 0 = xy Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1xy' to each side of the equation. 0 + -1xy = xy + -1xy Remove the zero: -1xy = xy + -1xy Combine like terms: xy + -1xy = 0 -1xy = 0 Divide each side by '-1'. xy = 0 Simplifying xy = 0 The solution to this equation could not be determined.
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