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Simplifying (2x + -4y + 7)(2x + 4y + -7) = 0 Reorder the terms: (7 + 2x + -4y)(2x + 4y + -7) = 0 Reorder the terms: (7 + 2x + -4y)(-7 + 2x + 4y) = 0 Multiply (7 + 2x + -4y) * (-7 + 2x + 4y) (7(-7 + 2x + 4y) + 2x * (-7 + 2x + 4y) + -4y * (-7 + 2x + 4y)) = 0 ((-7 * 7 + 2x * 7 + 4y * 7) + 2x * (-7 + 2x + 4y) + -4y * (-7 + 2x + 4y)) = 0 ((-49 + 14x + 28y) + 2x * (-7 + 2x + 4y) + -4y * (-7 + 2x + 4y)) = 0 (-49 + 14x + 28y + (-7 * 2x + 2x * 2x + 4y * 2x) + -4y * (-7 + 2x + 4y)) = 0 Reorder the terms: (-49 + 14x + 28y + (-14x + 8xy + 4x2) + -4y * (-7 + 2x + 4y)) = 0 (-49 + 14x + 28y + (-14x + 8xy + 4x2) + -4y * (-7 + 2x + 4y)) = 0 (-49 + 14x + 28y + -14x + 8xy + 4x2 + (-7 * -4y + 2x * -4y + 4y * -4y)) = 0 Reorder the terms: (-49 + 14x + 28y + -14x + 8xy + 4x2 + (-8xy + 28y + -16y2)) = 0 (-49 + 14x + 28y + -14x + 8xy + 4x2 + (-8xy + 28y + -16y2)) = 0 Reorder the terms: (-49 + 14x + -14x + 8xy + -8xy + 4x2 + 28y + 28y + -16y2) = 0 Combine like terms: 14x + -14x = 0 (-49 + 0 + 8xy + -8xy + 4x2 + 28y + 28y + -16y2) = 0 (-49 + 8xy + -8xy + 4x2 + 28y + 28y + -16y2) = 0 Combine like terms: 8xy + -8xy = 0 (-49 + 0 + 4x2 + 28y + 28y + -16y2) = 0 (-49 + 4x2 + 28y + 28y + -16y2) = 0 Combine like terms: 28y + 28y = 56y (-49 + 4x2 + 56y + -16y2) = 0 Solving -49 + 4x2 + 56y + -16y2 = 0 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '49' to each side of the equation. -49 + 4x2 + 56y + 49 + -16y2 = 0 + 49 Reorder the terms: -49 + 49 + 4x2 + 56y + -16y2 = 0 + 49 Combine like terms: -49 + 49 = 0 0 + 4x2 + 56y + -16y2 = 0 + 49 4x2 + 56y + -16y2 = 0 + 49 Combine like terms: 0 + 49 = 49 4x2 + 56y + -16y2 = 49 Add '-56y' to each side of the equation. 4x2 + 56y + -56y + -16y2 = 49 + -56y Combine like terms: 56y + -56y = 0 4x2 + 0 + -16y2 = 49 + -56y 4x2 + -16y2 = 49 + -56y Add '16y2' to each side of the equation. 4x2 + -16y2 + 16y2 = 49 + -56y + 16y2 Combine like terms: -16y2 + 16y2 = 0 4x2 + 0 = 49 + -56y + 16y2 4x2 = 49 + -56y + 16y2 Divide each side by '4'. x2 = 12.25 + -14y + 4y2 Simplifying x2 = 12.25 + -14y + 4y2 Reorder the terms: -12.25 + x2 + 14y + -4y2 = 12.25 + -14y + 4y2 + -12.25 + 14y + -4y2 Reorder the terms: -12.25 + x2 + 14y + -4y2 = 12.25 + -12.25 + -14y + 14y + 4y2 + -4y2 Combine like terms: 12.25 + -12.25 = 0.00 -12.25 + x2 + 14y + -4y2 = 0.00 + -14y + 14y + 4y2 + -4y2 -12.25 + x2 + 14y + -4y2 = -14y + 14y + 4y2 + -4y2 Combine like terms: -14y + 14y = 0 -12.25 + x2 + 14y + -4y2 = 0 + 4y2 + -4y2 -12.25 + x2 + 14y + -4y2 = 4y2 + -4y2 Combine like terms: 4y2 + -4y2 = 0 -12.25 + x2 + 14y + -4y2 = 0 The solution to this equation could not be determined.
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