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Simplifying 4x2 + -4x + -77 = 0 Reorder the terms: -77 + -4x + 4x2 = 0 Solving -77 + -4x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -19.25 + -1x + x2 = 0 Move the constant term to the right: Add '19.25' to each side of the equation. -19.25 + -1x + 19.25 + x2 = 0 + 19.25 Reorder the terms: -19.25 + 19.25 + -1x + x2 = 0 + 19.25 Combine like terms: -19.25 + 19.25 = 0.00 0.00 + -1x + x2 = 0 + 19.25 -1x + x2 = 0 + 19.25 Combine like terms: 0 + 19.25 = 19.25 -1x + x2 = 19.25 The x term is -1x. Take half its coefficient (-0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. -1x + 0.25 + x2 = 19.25 + 0.25 Reorder the terms: 0.25 + -1x + x2 = 19.25 + 0.25 Combine like terms: 19.25 + 0.25 = 19.5 0.25 + -1x + x2 = 19.5 Factor a perfect square on the left side: (x + -0.5)(x + -0.5) = 19.5 Calculate the square root of the right side: 4.415880433 Break this problem into two subproblems by setting (x + -0.5) equal to 4.415880433 and -4.415880433.Subproblem 1
x + -0.5 = 4.415880433 Simplifying x + -0.5 = 4.415880433 Reorder the terms: -0.5 + x = 4.415880433 Solving -0.5 + x = 4.415880433 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 4.415880433 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 4.415880433 + 0.5 x = 4.415880433 + 0.5 Combine like terms: 4.415880433 + 0.5 = 4.915880433 x = 4.915880433 Simplifying x = 4.915880433Subproblem 2
x + -0.5 = -4.415880433 Simplifying x + -0.5 = -4.415880433 Reorder the terms: -0.5 + x = -4.415880433 Solving -0.5 + x = -4.415880433 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -4.415880433 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -4.415880433 + 0.5 x = -4.415880433 + 0.5 Combine like terms: -4.415880433 + 0.5 = -3.915880433 x = -3.915880433 Simplifying x = -3.915880433Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.915880433, -3.915880433}
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