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Simplifying 0.3 = -0.5x2 + x + 4 Reorder the terms: 0.3 = 4 + x + -0.5x2 Solving 0.3 = 4 + x + -0.5x2 Solving for variable 'x'. Combine like terms: 0.3 + -4 = -3.7 -3.7 + -1x + 0.5x2 = 4 + x + -0.5x2 + -4 + -1x + 0.5x2 Reorder the terms: -3.7 + -1x + 0.5x2 = 4 + -4 + x + -1x + -0.5x2 + 0.5x2 Combine like terms: 4 + -4 = 0 -3.7 + -1x + 0.5x2 = 0 + x + -1x + -0.5x2 + 0.5x2 -3.7 + -1x + 0.5x2 = x + -1x + -0.5x2 + 0.5x2 Combine like terms: x + -1x = 0 -3.7 + -1x + 0.5x2 = 0 + -0.5x2 + 0.5x2 -3.7 + -1x + 0.5x2 = -0.5x2 + 0.5x2 Combine like terms: -0.5x2 + 0.5x2 = 0.0 -3.7 + -1x + 0.5x2 = 0.0 Begin completing the square. Divide all terms by 0.5 the coefficient of the squared term: Divide each side by '0.5'. -7.4 + -2x + x2 = 0 Move the constant term to the right: Add '7.4' to each side of the equation. -7.4 + -2x + 7.4 + x2 = 0 + 7.4 Reorder the terms: -7.4 + 7.4 + -2x + x2 = 0 + 7.4 Combine like terms: -7.4 + 7.4 = 0.0 0.0 + -2x + x2 = 0 + 7.4 -2x + x2 = 0 + 7.4 Combine like terms: 0 + 7.4 = 7.4 -2x + x2 = 7.4 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = 7.4 + 1 Reorder the terms: 1 + -2x + x2 = 7.4 + 1 Combine like terms: 7.4 + 1 = 8.4 1 + -2x + x2 = 8.4 Factor a perfect square on the left side: (x + -1)(x + -1) = 8.4 Calculate the square root of the right side: 2.898275349 Break this problem into two subproblems by setting (x + -1) equal to 2.898275349 and -2.898275349.Subproblem 1
x + -1 = 2.898275349 Simplifying x + -1 = 2.898275349 Reorder the terms: -1 + x = 2.898275349 Solving -1 + x = 2.898275349 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 2.898275349 + 1 Combine like terms: -1 + 1 = 0 0 + x = 2.898275349 + 1 x = 2.898275349 + 1 Combine like terms: 2.898275349 + 1 = 3.898275349 x = 3.898275349 Simplifying x = 3.898275349Subproblem 2
x + -1 = -2.898275349 Simplifying x + -1 = -2.898275349 Reorder the terms: -1 + x = -2.898275349 Solving -1 + x = -2.898275349 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -2.898275349 + 1 Combine like terms: -1 + 1 = 0 0 + x = -2.898275349 + 1 x = -2.898275349 + 1 Combine like terms: -2.898275349 + 1 = -1.898275349 x = -1.898275349 Simplifying x = -1.898275349Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.898275349, -1.898275349}
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