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Simplifying 7x2 + 35x + 25 = 0 Reorder the terms: 25 + 35x + 7x2 = 0 Solving 25 + 35x + 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'. 3.571428571 + 5x + x2 = 0 Move the constant term to the right: Add '-3.571428571' to each side of the equation. 3.571428571 + 5x + -3.571428571 + x2 = 0 + -3.571428571 Reorder the terms: 3.571428571 + -3.571428571 + 5x + x2 = 0 + -3.571428571 Combine like terms: 3.571428571 + -3.571428571 = 0.000000000 0.000000000 + 5x + x2 = 0 + -3.571428571 5x + x2 = 0 + -3.571428571 Combine like terms: 0 + -3.571428571 = -3.571428571 5x + x2 = -3.571428571 The x term is 5x. Take half its coefficient (2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. 5x + 6.25 + x2 = -3.571428571 + 6.25 Reorder the terms: 6.25 + 5x + x2 = -3.571428571 + 6.25 Combine like terms: -3.571428571 + 6.25 = 2.678571429 6.25 + 5x + x2 = 2.678571429 Factor a perfect square on the left side: (x + 2.5)(x + 2.5) = 2.678571429 Calculate the square root of the right side: 1.636634177 Break this problem into two subproblems by setting (x + 2.5) equal to 1.636634177 and -1.636634177.Subproblem 1
x + 2.5 = 1.636634177 Simplifying x + 2.5 = 1.636634177 Reorder the terms: 2.5 + x = 1.636634177 Solving 2.5 + x = 1.636634177 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = 1.636634177 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = 1.636634177 + -2.5 x = 1.636634177 + -2.5 Combine like terms: 1.636634177 + -2.5 = -0.863365823 x = -0.863365823 Simplifying x = -0.863365823Subproblem 2
x + 2.5 = -1.636634177 Simplifying x + 2.5 = -1.636634177 Reorder the terms: 2.5 + x = -1.636634177 Solving 2.5 + x = -1.636634177 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + x = -1.636634177 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + x = -1.636634177 + -2.5 x = -1.636634177 + -2.5 Combine like terms: -1.636634177 + -2.5 = -4.136634177 x = -4.136634177 Simplifying x = -4.136634177Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.863365823, -4.136634177}
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