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Simplifying (x * x) + xy + -1(2y * 2y) = 0 Multiply x * x (x2) + xy + -1(2y * 2y) = 0 x2 + xy + -1(2y * 2y) = 0 Reorder the terms for easier multiplication: x2 + xy + -1(2 * 2y * y) = 0 Multiply 2 * 2 x2 + xy + -1(4y * y) = 0 Multiply y * y x2 + xy + -1(4y2) = 0 Remove parenthesis around (4y2) x2 + xy + -1 * 4y2 = 0 Multiply -1 * 4 x2 + xy + -4y2 = 0 Reorder the terms: xy + x2 + -4y2 = 0 Solving xy + x2 + -4y2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '4y2' to each side of the equation. xy + x2 + -4y2 + 4y2 = 0 + 4y2 Combine like terms: -4y2 + 4y2 = 0 xy + x2 + 0 = 0 + 4y2 xy + x2 = 0 + 4y2 Remove the zero: xy + x2 = 4y2 The x term is xy. Take half its coefficient (0.5y). Square it (0.25y2) and add it to both sides. Add '0.25y2' to each side of the equation. xy + x2 + 0.25y2 = 4y2 + 0.25y2 Combine like terms: 4y2 + 0.25y2 = 4.25y2 xy + x2 + 0.25y2 = 4.25y2 Factor a perfect square on the left side: (x + 0.5y)(x + 0.5y) = 4.25y2 Calculate the square root of the right side: 2.061552813y Break this problem into two subproblems by setting (x + 0.5y) equal to 2.061552813y and -2.061552813y.Subproblem 1
x + 0.5y = 2.061552813y Simplifying x + 0.5y = 2.061552813y Solving x + 0.5y = 2.061552813y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5y' to each side of the equation. x + 0.5y + -0.5y = 2.061552813y + -0.5y Combine like terms: 0.5y + -0.5y = 0.0 x + 0.0 = 2.061552813y + -0.5y x = 2.061552813y + -0.5y Combine like terms: 2.061552813y + -0.5y = 1.561552813y x = 1.561552813y Simplifying x = 1.561552813ySubproblem 2
x + 0.5y = -2.061552813y Simplifying x + 0.5y = -2.061552813y Solving x + 0.5y = -2.061552813y Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5y' to each side of the equation. x + 0.5y + -0.5y = -2.061552813y + -0.5y Combine like terms: 0.5y + -0.5y = 0.0 x + 0.0 = -2.061552813y + -0.5y x = -2.061552813y + -0.5y Combine like terms: -2.061552813y + -0.5y = -2.561552813y x = -2.561552813y Simplifying x = -2.561552813ySolution
The solution to the problem is based on the solutions from the subproblems. x = {1.561552813y, -2.561552813y}
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