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Simplifying 5x2 + 20x + -14 = 0 Reorder the terms: -14 + 20x + 5x2 = 0 Solving -14 + 20x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -2.8 + 4x + x2 = 0 Move the constant term to the right: Add '2.8' to each side of the equation. -2.8 + 4x + 2.8 + x2 = 0 + 2.8 Reorder the terms: -2.8 + 2.8 + 4x + x2 = 0 + 2.8 Combine like terms: -2.8 + 2.8 = 0.0 0.0 + 4x + x2 = 0 + 2.8 4x + x2 = 0 + 2.8 Combine like terms: 0 + 2.8 = 2.8 4x + x2 = 2.8 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 = 2.8 + 4 Reorder the terms: 4 + 4x + x2 = 2.8 + 4 Combine like terms: 2.8 + 4 = 6.8 4 + 4x + x2 = 6.8 Factor a perfect square on the left side: (x + 2)(x + 2) = 6.8 Calculate the square root of the right side: 2.607680962 Break this problem into two subproblems by setting (x + 2) equal to 2.607680962 and -2.607680962.Subproblem 1
x + 2 = 2.607680962 Simplifying x + 2 = 2.607680962 Reorder the terms: 2 + x = 2.607680962 Solving 2 + x = 2.607680962 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 = 2.607680962 + -2 Combine like terms: 2 + -2 = 0 0 + x = 2.607680962 + -2 x = 2.607680962 + -2 Combine like terms: 2.607680962 + -2 = 0.607680962 x = 0.607680962 Simplifying x = 0.607680962Subproblem 2
x + 2 = -2.607680962 Simplifying x + 2 = -2.607680962 Reorder the terms: 2 + x = -2.607680962 Solving 2 + x = -2.607680962 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 = -2.607680962 + -2 Combine like terms: 2 + -2 = 0 0 + x = -2.607680962 + -2 x = -2.607680962 + -2 Combine like terms: -2.607680962 + -2 = -4.607680962 x = -4.607680962 Simplifying x = -4.607680962Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.607680962, -4.607680962}
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