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Simplifying 7x(2x + -1) = 2 Reorder the terms: 7x(-1 + 2x) = 2 (-1 * 7x + 2x * 7x) = 2 (-7x + 14x2) = 2 Solving -7x + 14x2 = 2 Solving for variable 'x'. Reorder the terms: -2 + -7x + 14x2 = 2 + -2 Combine like terms: 2 + -2 = 0 -2 + -7x + 14x2 = 0 Begin completing the square. Divide all terms by 14 the coefficient of the squared term: Divide each side by '14'. -0.1428571429 + -0.5x + x2 = 0 Move the constant term to the right: Add '0.1428571429' to each side of the equation. -0.1428571429 + -0.5x + 0.1428571429 + x2 = 0 + 0.1428571429 Reorder the terms: -0.1428571429 + 0.1428571429 + -0.5x + x2 = 0 + 0.1428571429 Combine like terms: -0.1428571429 + 0.1428571429 = 0.0000000000 0.0000000000 + -0.5x + x2 = 0 + 0.1428571429 -0.5x + x2 = 0 + 0.1428571429 Combine like terms: 0 + 0.1428571429 = 0.1428571429 -0.5x + x2 = 0.1428571429 The x term is -0.5x. Take half its coefficient (-0.25). Square it (0.0625) and add it to both sides. Add '0.0625' to each side of the equation. -0.5x + 0.0625 + x2 = 0.1428571429 + 0.0625 Reorder the terms: 0.0625 + -0.5x + x2 = 0.1428571429 + 0.0625 Combine like terms: 0.1428571429 + 0.0625 = 0.2053571429 0.0625 + -0.5x + x2 = 0.2053571429 Factor a perfect square on the left side: (x + -0.25)(x + -0.25) = 0.2053571429 Calculate the square root of the right side: 0.453163484 Break this problem into two subproblems by setting (x + -0.25) equal to 0.453163484 and -0.453163484.Subproblem 1
x + -0.25 = 0.453163484 Simplifying x + -0.25 = 0.453163484 Reorder the terms: -0.25 + x = 0.453163484 Solving -0.25 + x = 0.453163484 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = 0.453163484 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = 0.453163484 + 0.25 x = 0.453163484 + 0.25 Combine like terms: 0.453163484 + 0.25 = 0.703163484 x = 0.703163484 Simplifying x = 0.703163484Subproblem 2
x + -0.25 = -0.453163484 Simplifying x + -0.25 = -0.453163484 Reorder the terms: -0.25 + x = -0.453163484 Solving -0.25 + x = -0.453163484 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.25' to each side of the equation. -0.25 + 0.25 + x = -0.453163484 + 0.25 Combine like terms: -0.25 + 0.25 = 0.00 0.00 + x = -0.453163484 + 0.25 x = -0.453163484 + 0.25 Combine like terms: -0.453163484 + 0.25 = -0.203163484 x = -0.203163484 Simplifying x = -0.203163484Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.703163484, -0.203163484}
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