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Simplifying x = -5x2 + -2x + 16 Reorder the terms: x = 16 + -2x + -5x2 Solving x = 16 + -2x + -5x2 Solving for variable 'x'. Reorder the terms: -16 + x + 2x + 5x2 = 16 + -2x + -5x2 + -16 + 2x + 5x2 Combine like terms: x + 2x = 3x -16 + 3x + 5x2 = 16 + -2x + -5x2 + -16 + 2x + 5x2 Reorder the terms: -16 + 3x + 5x2 = 16 + -16 + -2x + 2x + -5x2 + 5x2 Combine like terms: 16 + -16 = 0 -16 + 3x + 5x2 = 0 + -2x + 2x + -5x2 + 5x2 -16 + 3x + 5x2 = -2x + 2x + -5x2 + 5x2 Combine like terms: -2x + 2x = 0 -16 + 3x + 5x2 = 0 + -5x2 + 5x2 -16 + 3x + 5x2 = -5x2 + 5x2 Combine like terms: -5x2 + 5x2 = 0 -16 + 3x + 5x2 = 0 Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -3.2 + 0.6x + x2 = 0 Move the constant term to the right: Add '3.2' to each side of the equation. -3.2 + 0.6x + 3.2 + x2 = 0 + 3.2 Reorder the terms: -3.2 + 3.2 + 0.6x + x2 = 0 + 3.2 Combine like terms: -3.2 + 3.2 = 0.0 0.0 + 0.6x + x2 = 0 + 3.2 0.6x + x2 = 0 + 3.2 Combine like terms: 0 + 3.2 = 3.2 0.6x + x2 = 3.2 The x term is 0.6x. Take half its coefficient (0.3). Square it (0.09) and add it to both sides. Add '0.09' to each side of the equation. 0.6x + 0.09 + x2 = 3.2 + 0.09 Reorder the terms: 0.09 + 0.6x + x2 = 3.2 + 0.09 Combine like terms: 3.2 + 0.09 = 3.29 0.09 + 0.6x + x2 = 3.29 Factor a perfect square on the left side: (x + 0.3)(x + 0.3) = 3.29 Calculate the square root of the right side: 1.813835715 Break this problem into two subproblems by setting (x + 0.3) equal to 1.813835715 and -1.813835715.Subproblem 1
x + 0.3 = 1.813835715 Simplifying x + 0.3 = 1.813835715 Reorder the terms: 0.3 + x = 1.813835715 Solving 0.3 + x = 1.813835715 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = 1.813835715 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = 1.813835715 + -0.3 x = 1.813835715 + -0.3 Combine like terms: 1.813835715 + -0.3 = 1.513835715 x = 1.513835715 Simplifying x = 1.513835715Subproblem 2
x + 0.3 = -1.813835715 Simplifying x + 0.3 = -1.813835715 Reorder the terms: 0.3 + x = -1.813835715 Solving 0.3 + x = -1.813835715 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.3' to each side of the equation. 0.3 + -0.3 + x = -1.813835715 + -0.3 Combine like terms: 0.3 + -0.3 = 0.0 0.0 + x = -1.813835715 + -0.3 x = -1.813835715 + -0.3 Combine like terms: -1.813835715 + -0.3 = -2.113835715 x = -2.113835715 Simplifying x = -2.113835715Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.513835715, -2.113835715}
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