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Simplifying x2 + 0.2x + -7 = 0 Reorder the terms: -7 + 0.2x + x2 = 0 Solving -7 + 0.2x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '7' to each side of the equation. -7 + 0.2x + 7 + x2 = 0 + 7 Reorder the terms: -7 + 7 + 0.2x + x2 = 0 + 7 Combine like terms: -7 + 7 = 0 0 + 0.2x + x2 = 0 + 7 0.2x + x2 = 0 + 7 Combine like terms: 0 + 7 = 7 0.2x + x2 = 7 The x term is 0.2x. Take half its coefficient (0.1). Square it (0.01) and add it to both sides. Add '0.01' to each side of the equation. 0.2x + 0.01 + x2 = 7 + 0.01 Reorder the terms: 0.01 + 0.2x + x2 = 7 + 0.01 Combine like terms: 7 + 0.01 = 7.01 0.01 + 0.2x + x2 = 7.01 Factor a perfect square on the left side: (x + 0.1)(x + 0.1) = 7.01 Calculate the square root of the right side: 2.647640459 Break this problem into two subproblems by setting (x + 0.1) equal to 2.647640459 and -2.647640459.Subproblem 1
x + 0.1 = 2.647640459 Simplifying x + 0.1 = 2.647640459 Reorder the terms: 0.1 + x = 2.647640459 Solving 0.1 + x = 2.647640459 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = 2.647640459 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = 2.647640459 + -0.1 x = 2.647640459 + -0.1 Combine like terms: 2.647640459 + -0.1 = 2.547640459 x = 2.547640459 Simplifying x = 2.547640459Subproblem 2
x + 0.1 = -2.647640459 Simplifying x + 0.1 = -2.647640459 Reorder the terms: 0.1 + x = -2.647640459 Solving 0.1 + x = -2.647640459 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1' to each side of the equation. 0.1 + -0.1 + x = -2.647640459 + -0.1 Combine like terms: 0.1 + -0.1 = 0.0 0.0 + x = -2.647640459 + -0.1 x = -2.647640459 + -0.1 Combine like terms: -2.647640459 + -0.1 = -2.747640459 x = -2.747640459 Simplifying x = -2.747640459Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.547640459, -2.747640459}
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