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Simplifying 7x2 + 28x + 26 = 0 Reorder the terms: 26 + 28x + 7x2 = 0 Solving 26 + 28x + 7x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 7 the coefficient of the squared term: Divide each side by '7'. 3.714285714 + 4x + x2 = 0 Move the constant term to the right: Add '-3.714285714' to each side of the equation. 3.714285714 + 4x + -3.714285714 + x2 = 0 + -3.714285714 Reorder the terms: 3.714285714 + -3.714285714 + 4x + x2 = 0 + -3.714285714 Combine like terms: 3.714285714 + -3.714285714 = 0.000000000 0.000000000 + 4x + x2 = 0 + -3.714285714 4x + x2 = 0 + -3.714285714 Combine like terms: 0 + -3.714285714 = -3.714285714 4x + x2 = -3.714285714 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = -3.714285714 + 4 Reorder the terms: 4 + 4x + x2 = -3.714285714 + 4 Combine like terms: -3.714285714 + 4 = 0.285714286 4 + 4x + x2 = 0.285714286 Factor a perfect square on the left side: (x + 2)(x + 2) = 0.285714286 Calculate the square root of the right side: 0.534522484 Break this problem into two subproblems by setting (x + 2) equal to 0.534522484 and -0.534522484.Subproblem 1
x + 2 = 0.534522484 Simplifying x + 2 = 0.534522484 Reorder the terms: 2 + x = 0.534522484 Solving 2 + x = 0.534522484 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 0.534522484 + -2 Combine like terms: 2 + -2 = 0 0 + x = 0.534522484 + -2 x = 0.534522484 + -2 Combine like terms: 0.534522484 + -2 = -1.465477516 x = -1.465477516 Simplifying x = -1.465477516Subproblem 2
x + 2 = -0.534522484 Simplifying x + 2 = -0.534522484 Reorder the terms: 2 + x = -0.534522484 Solving 2 + x = -0.534522484 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -0.534522484 + -2 Combine like terms: 2 + -2 = 0 0 + x = -0.534522484 + -2 x = -0.534522484 + -2 Combine like terms: -0.534522484 + -2 = -2.534522484 x = -2.534522484 Simplifying x = -2.534522484Solution
The solution to the problem is based on the solutions from the subproblems. x = {-1.465477516, -2.534522484}
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