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Simplifying 4x2 + 11x + 5 + -3x2 + -4x + -12 = 0 Reorder the terms: 5 + -12 + 11x + -4x + 4x2 + -3x2 = 0 Combine like terms: 5 + -12 = -7 -7 + 11x + -4x + 4x2 + -3x2 = 0 Combine like terms: 11x + -4x = 7x -7 + 7x + 4x2 + -3x2 = 0 Combine like terms: 4x2 + -3x2 = 1x2 -7 + 7x + 1x2 = 0 Solving -7 + 7x + 1x2 = 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 + 7x + 7 + x2 = 0 + 7 Reorder the terms: -7 + 7 + 7x + x2 = 0 + 7 Combine like terms: -7 + 7 = 0 0 + 7x + x2 = 0 + 7 7x + x2 = 0 + 7 Combine like terms: 0 + 7 = 7 7x + x2 = 7 The x term is 7x. Take half its coefficient (3.5). Square it (12.25) and add it to both sides. Add '12.25' to each side of the equation. 7x + 12.25 + x2 = 7 + 12.25 Reorder the terms: 12.25 + 7x + x2 = 7 + 12.25 Combine like terms: 7 + 12.25 = 19.25 12.25 + 7x + x2 = 19.25 Factor a perfect square on the left side: (x + 3.5)(x + 3.5) = 19.25 Calculate the square root of the right side: 4.387482194 Break this problem into two subproblems by setting (x + 3.5) equal to 4.387482194 and -4.387482194.Subproblem 1
x + 3.5 = 4.387482194 Simplifying x + 3.5 = 4.387482194 Reorder the terms: 3.5 + x = 4.387482194 Solving 3.5 + x = 4.387482194 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = 4.387482194 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = 4.387482194 + -3.5 x = 4.387482194 + -3.5 Combine like terms: 4.387482194 + -3.5 = 0.887482194 x = 0.887482194 Simplifying x = 0.887482194Subproblem 2
x + 3.5 = -4.387482194 Simplifying x + 3.5 = -4.387482194 Reorder the terms: 3.5 + x = -4.387482194 Solving 3.5 + x = -4.387482194 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + x = -4.387482194 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + x = -4.387482194 + -3.5 x = -4.387482194 + -3.5 Combine like terms: -4.387482194 + -3.5 = -7.887482194 x = -7.887482194 Simplifying x = -7.887482194Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.887482194, -7.887482194}
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