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Simplifying (-16) * x2 + 80x + 7 = 0 Reorder the terms: 7 + 80x + -16x2 = 0 Solving 7 + 80x + -16x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -16 the coefficient of the squared term: Divide each side by '-16'. -0.4375 + -5x + x2 = 0 Move the constant term to the right: Add '0.4375' to each side of the equation. -0.4375 + -5x + 0.4375 + x2 = 0 + 0.4375 Reorder the terms: -0.4375 + 0.4375 + -5x + x2 = 0 + 0.4375 Combine like terms: -0.4375 + 0.4375 = 0.0000 0.0000 + -5x + x2 = 0 + 0.4375 -5x + x2 = 0 + 0.4375 Combine like terms: 0 + 0.4375 = 0.4375 -5x + x2 = 0.4375 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 = 0.4375 + 6.25 Reorder the terms: 6.25 + -5x + x2 = 0.4375 + 6.25 Combine like terms: 0.4375 + 6.25 = 6.6875 6.25 + -5x + x2 = 6.6875 Factor a perfect square on the left side: (x + -2.5)(x + -2.5) = 6.6875 Calculate the square root of the right side: 2.586020108 Break this problem into two subproblems by setting (x + -2.5) equal to 2.586020108 and -2.586020108.Subproblem 1
x + -2.5 = 2.586020108 Simplifying x + -2.5 = 2.586020108 Reorder the terms: -2.5 + x = 2.586020108 Solving -2.5 + x = 2.586020108 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 = 2.586020108 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 2.586020108 + 2.5 x = 2.586020108 + 2.5 Combine like terms: 2.586020108 + 2.5 = 5.086020108 x = 5.086020108 Simplifying x = 5.086020108Subproblem 2
x + -2.5 = -2.586020108 Simplifying x + -2.5 = -2.586020108 Reorder the terms: -2.5 + x = -2.586020108 Solving -2.5 + x = -2.586020108 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 = -2.586020108 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -2.586020108 + 2.5 x = -2.586020108 + 2.5 Combine like terms: -2.586020108 + 2.5 = -0.086020108 x = -0.086020108 Simplifying x = -0.086020108Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.086020108, -0.086020108}
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