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Simplifying -9f2 + -9f + 5 = 0 Reorder the terms: 5 + -9f + -9f2 = 0 Solving 5 + -9f + -9f2 = 0 Solving for variable 'f'. Begin completing the square. Divide all terms by -9 the coefficient of the squared term: Divide each side by '-9'. -0.5555555556 + f + f2 = 0 Move the constant term to the right: Add '0.5555555556' to each side of the equation. -0.5555555556 + f + 0.5555555556 + f2 = 0 + 0.5555555556 Reorder the terms: -0.5555555556 + 0.5555555556 + f + f2 = 0 + 0.5555555556 Combine like terms: -0.5555555556 + 0.5555555556 = 0.0000000000 0.0000000000 + f + f2 = 0 + 0.5555555556 f + f2 = 0 + 0.5555555556 Combine like terms: 0 + 0.5555555556 = 0.5555555556 f + f2 = 0.5555555556 The f term is f. 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. + 0.25 + f2 = 0.5555555556 + 0.25 Combine like terms: + 0.25 = 1.25 1.25 + f2 = 0.5555555556 + 0.25 Combine like terms: 0.5555555556 + 0.25 = 0.8055555556 1.25 + f2 = 0.8055555556 Factor a perfect square on the left side: (f + 0.5)(f + 0.5) = 0.8055555556 Calculate the square root of the right side: 0.897527468 Break this problem into two subproblems by setting (f + 0.5) equal to 0.897527468 and -0.897527468.Subproblem 1
f + 0.5 = 0.897527468 Simplifying f + 0.5 = 0.897527468 Reorder the terms: 0.5 + f = 0.897527468 Solving 0.5 + f = 0.897527468 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + f = 0.897527468 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + f = 0.897527468 + -0.5 f = 0.897527468 + -0.5 Combine like terms: 0.897527468 + -0.5 = 0.397527468 f = 0.397527468 Simplifying f = 0.397527468Subproblem 2
f + 0.5 = -0.897527468 Simplifying f + 0.5 = -0.897527468 Reorder the terms: 0.5 + f = -0.897527468 Solving 0.5 + f = -0.897527468 Solving for variable 'f'. Move all terms containing f to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + f = -0.897527468 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + f = -0.897527468 + -0.5 f = -0.897527468 + -0.5 Combine like terms: -0.897527468 + -0.5 = -1.397527468 f = -1.397527468 Simplifying f = -1.397527468Solution
The solution to the problem is based on the solutions from the subproblems. f = {0.397527468, -1.397527468}
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