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Simplifying x2 + 1.4x = 1.2 Reorder the terms: 1.4x + x2 = 1.2 Solving 1.4x + x2 = 1.2 Solving for variable 'x'. Reorder the terms: -1.2 + 1.4x + x2 = 1.2 + -1.2 Combine like terms: 1.2 + -1.2 = 0.0 -1.2 + 1.4x + x2 = 0.0 Begin completing the square. Move the constant term to the right: Add '1.2' to each side of the equation. -1.2 + 1.4x + 1.2 + x2 = 0.0 + 1.2 Reorder the terms: -1.2 + 1.2 + 1.4x + x2 = 0.0 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + 1.4x + x2 = 0.0 + 1.2 1.4x + x2 = 0.0 + 1.2 Combine like terms: 0.0 + 1.2 = 1.2 1.4x + x2 = 1.2 The x term is 1.4x. Take half its coefficient (0.7). Square it (0.49) and add it to both sides. Add '0.49' to each side of the equation. 1.4x + 0.49 + x2 = 1.2 + 0.49 Reorder the terms: 0.49 + 1.4x + x2 = 1.2 + 0.49 Combine like terms: 1.2 + 0.49 = 1.69 0.49 + 1.4x + x2 = 1.69 Factor a perfect square on the left side: (x + 0.7)(x + 0.7) = 1.69 Calculate the square root of the right side: 1.3 Break this problem into two subproblems by setting (x + 0.7) equal to 1.3 and -1.3.Subproblem 1
x + 0.7 = 1.3 Simplifying x + 0.7 = 1.3 Reorder the terms: 0.7 + x = 1.3 Solving 0.7 + x = 1.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + x = 1.3 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + x = 1.3 + -0.7 x = 1.3 + -0.7 Combine like terms: 1.3 + -0.7 = 0.6 x = 0.6 Simplifying x = 0.6Subproblem 2
x + 0.7 = -1.3 Simplifying x + 0.7 = -1.3 Reorder the terms: 0.7 + x = -1.3 Solving 0.7 + x = -1.3 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.7' to each side of the equation. 0.7 + -0.7 + x = -1.3 + -0.7 Combine like terms: 0.7 + -0.7 = 0.0 0.0 + x = -1.3 + -0.7 x = -1.3 + -0.7 Combine like terms: -1.3 + -0.7 = -2 x = -2 Simplifying x = -2Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.6, -2}
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