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Simplifying 5x2 + -14x + -2 = 0 Reorder the terms: -2 + -14x + 5x2 = 0 Solving -2 + -14x + 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'. -0.4 + -2.8x + x2 = 0 Move the constant term to the right: Add '0.4' to each side of the equation. -0.4 + -2.8x + 0.4 + x2 = 0 + 0.4 Reorder the terms: -0.4 + 0.4 + -2.8x + x2 = 0 + 0.4 Combine like terms: -0.4 + 0.4 = 0.0 0.0 + -2.8x + x2 = 0 + 0.4 -2.8x + x2 = 0 + 0.4 Combine like terms: 0 + 0.4 = 0.4 -2.8x + x2 = 0.4 The x term is -2.8x. Take half its coefficient (-1.4). Square it (1.96) and add it to both sides. Add '1.96' to each side of the equation. -2.8x + 1.96 + x2 = 0.4 + 1.96 Reorder the terms: 1.96 + -2.8x + x2 = 0.4 + 1.96 Combine like terms: 0.4 + 1.96 = 2.36 1.96 + -2.8x + x2 = 2.36 Factor a perfect square on the left side: (x + -1.4)(x + -1.4) = 2.36 Calculate the square root of the right side: 1.53622915 Break this problem into two subproblems by setting (x + -1.4) equal to 1.53622915 and -1.53622915.Subproblem 1
x + -1.4 = 1.53622915 Simplifying x + -1.4 = 1.53622915 Reorder the terms: -1.4 + x = 1.53622915 Solving -1.4 + x = 1.53622915 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + x = 1.53622915 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + x = 1.53622915 + 1.4 x = 1.53622915 + 1.4 Combine like terms: 1.53622915 + 1.4 = 2.93622915 x = 2.93622915 Simplifying x = 2.93622915Subproblem 2
x + -1.4 = -1.53622915 Simplifying x + -1.4 = -1.53622915 Reorder the terms: -1.4 + x = -1.53622915 Solving -1.4 + x = -1.53622915 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.4' to each side of the equation. -1.4 + 1.4 + x = -1.53622915 + 1.4 Combine like terms: -1.4 + 1.4 = 0.0 0.0 + x = -1.53622915 + 1.4 x = -1.53622915 + 1.4 Combine like terms: -1.53622915 + 1.4 = -0.13622915 x = -0.13622915 Simplifying x = -0.13622915Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.93622915, -0.13622915}
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