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Simplifying x2 + 20x + -2 = -7 Reorder the terms: -2 + 20x + x2 = -7 Solving -2 + 20x + x2 = -7 Solving for variable 'x'. Reorder the terms: -2 + 7 + 20x + x2 = -7 + 7 Combine like terms: -2 + 7 = 5 5 + 20x + x2 = -7 + 7 Combine like terms: -7 + 7 = 0 5 + 20x + x2 = 0 Begin completing the square. Move the constant term to the right: Add '-5' to each side of the equation. 5 + 20x + -5 + x2 = 0 + -5 Reorder the terms: 5 + -5 + 20x + x2 = 0 + -5 Combine like terms: 5 + -5 = 0 0 + 20x + x2 = 0 + -5 20x + x2 = 0 + -5 Combine like terms: 0 + -5 = -5 20x + x2 = -5 The x term is 20x. Take half its coefficient (10). Square it (100) and add it to both sides. Add '100' to each side of the equation. 20x + 100 + x2 = -5 + 100 Reorder the terms: 100 + 20x + x2 = -5 + 100 Combine like terms: -5 + 100 = 95 100 + 20x + x2 = 95 Factor a perfect square on the left side: (x + 10)(x + 10) = 95 Calculate the square root of the right side: 9.746794345 Break this problem into two subproblems by setting (x + 10) equal to 9.746794345 and -9.746794345.Subproblem 1
x + 10 = 9.746794345 Simplifying x + 10 = 9.746794345 Reorder the terms: 10 + x = 9.746794345 Solving 10 + x = 9.746794345 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = 9.746794345 + -10 Combine like terms: 10 + -10 = 0 0 + x = 9.746794345 + -10 x = 9.746794345 + -10 Combine like terms: 9.746794345 + -10 = -0.253205655 x = -0.253205655 Simplifying x = -0.253205655Subproblem 2
x + 10 = -9.746794345 Simplifying x + 10 = -9.746794345 Reorder the terms: 10 + x = -9.746794345 Solving 10 + x = -9.746794345 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + x = -9.746794345 + -10 Combine like terms: 10 + -10 = 0 0 + x = -9.746794345 + -10 x = -9.746794345 + -10 Combine like terms: -9.746794345 + -10 = -19.746794345 x = -19.746794345 Simplifying x = -19.746794345Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.253205655, -19.746794345}
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