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Simplifying (x2 + -3x + 5) + -1(-4x2 + 8x + 9) = 0 Reorder the terms: (5 + -3x + x2) + -1(-4x2 + 8x + 9) = 0 Remove parenthesis around (5 + -3x + x2) 5 + -3x + x2 + -1(-4x2 + 8x + 9) = 0 Reorder the terms: 5 + -3x + x2 + -1(9 + 8x + -4x2) = 0 5 + -3x + x2 + (9 * -1 + 8x * -1 + -4x2 * -1) = 0 5 + -3x + x2 + (-9 + -8x + 4x2) = 0 Reorder the terms: 5 + -9 + -3x + -8x + x2 + 4x2 = 0 Combine like terms: 5 + -9 = -4 -4 + -3x + -8x + x2 + 4x2 = 0 Combine like terms: -3x + -8x = -11x -4 + -11x + x2 + 4x2 = 0 Combine like terms: x2 + 4x2 = 5x2 -4 + -11x + 5x2 = 0 Solving -4 + -11x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -0.8 + -2.2x + x2 = 0 Move the constant term to the right: Add '0.8' to each side of the equation. -0.8 + -2.2x + 0.8 + x2 = 0 + 0.8 Reorder the terms: -0.8 + 0.8 + -2.2x + x2 = 0 + 0.8 Combine like terms: -0.8 + 0.8 = 0.0 0.0 + -2.2x + x2 = 0 + 0.8 -2.2x + x2 = 0 + 0.8 Combine like terms: 0 + 0.8 = 0.8 -2.2x + x2 = 0.8 The x term is -2.2x. Take half its coefficient (-1.1). Square it (1.21) and add it to both sides. Add '1.21' to each side of the equation. -2.2x + 1.21 + x2 = 0.8 + 1.21 Reorder the terms: 1.21 + -2.2x + x2 = 0.8 + 1.21 Combine like terms: 0.8 + 1.21 = 2.01 1.21 + -2.2x + x2 = 2.01 Factor a perfect square on the left side: (x + -1.1)(x + -1.1) = 2.01 Calculate the square root of the right side: 1.417744688 Break this problem into two subproblems by setting (x + -1.1) equal to 1.417744688 and -1.417744688.Subproblem 1
x + -1.1 = 1.417744688 Simplifying x + -1.1 = 1.417744688 Reorder the terms: -1.1 + x = 1.417744688 Solving -1.1 + x = 1.417744688 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = 1.417744688 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = 1.417744688 + 1.1 x = 1.417744688 + 1.1 Combine like terms: 1.417744688 + 1.1 = 2.517744688 x = 2.517744688 Simplifying x = 2.517744688Subproblem 2
x + -1.1 = -1.417744688 Simplifying x + -1.1 = -1.417744688 Reorder the terms: -1.1 + x = -1.417744688 Solving -1.1 + x = -1.417744688 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.1' to each side of the equation. -1.1 + 1.1 + x = -1.417744688 + 1.1 Combine like terms: -1.1 + 1.1 = 0.0 0.0 + x = -1.417744688 + 1.1 x = -1.417744688 + 1.1 Combine like terms: -1.417744688 + 1.1 = -0.317744688 x = -0.317744688 Simplifying x = -0.317744688Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.517744688, -0.317744688}
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