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Simplifying 0.07 = x2 + 10x Reorder the terms: 0.07 = 10x + x2 Solving 0.07 = 10x + x2 Solving for variable 'x'. Reorder the terms: 0.07 + -10x + -1x2 = 10x + -10x + x2 + -1x2 Combine like terms: 10x + -10x = 0 0.07 + -10x + -1x2 = 0 + x2 + -1x2 0.07 + -10x + -1x2 = x2 + -1x2 Combine like terms: x2 + -1x2 = 0 0.07 + -10x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -0.07 + 10x + x2 = 0 Move the constant term to the right: Add '0.07' to each side of the equation. -0.07 + 10x + 0.07 + x2 = 0 + 0.07 Reorder the terms: -0.07 + 0.07 + 10x + x2 = 0 + 0.07 Combine like terms: -0.07 + 0.07 = 0.00 0.00 + 10x + x2 = 0 + 0.07 10x + x2 = 0 + 0.07 Combine like terms: 0 + 0.07 = 0.07 10x + x2 = 0.07 The x term is 10x. Take half its coefficient (5). Square it (25) and add it to both sides. Add '25' to each side of the equation. 10x + 25 + x2 = 0.07 + 25 Reorder the terms: 25 + 10x + x2 = 0.07 + 25 Combine like terms: 0.07 + 25 = 25.07 25 + 10x + x2 = 25.07 Factor a perfect square on the left side: (x + 5)(x + 5) = 25.07 Calculate the square root of the right side: 5.006995107 Break this problem into two subproblems by setting (x + 5) equal to 5.006995107 and -5.006995107.Subproblem 1
x + 5 = 5.006995107 Simplifying x + 5 = 5.006995107 Reorder the terms: 5 + x = 5.006995107 Solving 5 + x = 5.006995107 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = 5.006995107 + -5 Combine like terms: 5 + -5 = 0 0 + x = 5.006995107 + -5 x = 5.006995107 + -5 Combine like terms: 5.006995107 + -5 = 0.006995107 x = 0.006995107 Simplifying x = 0.006995107Subproblem 2
x + 5 = -5.006995107 Simplifying x + 5 = -5.006995107 Reorder the terms: 5 + x = -5.006995107 Solving 5 + x = -5.006995107 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + x = -5.006995107 + -5 Combine like terms: 5 + -5 = 0 0 + x = -5.006995107 + -5 x = -5.006995107 + -5 Combine like terms: -5.006995107 + -5 = -10.006995107 x = -10.006995107 Simplifying x = -10.006995107Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.006995107, -10.006995107}
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