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Simplifying 81x2 + 27x + -5 = 0 Reorder the terms: -5 + 27x + 81x2 = 0 Solving -5 + 27x + 81x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 81 the coefficient of the squared term: Divide each side by '81'. -0.06172839506 + 0.3333333333x + x2 = 0 Move the constant term to the right: Add '0.06172839506' to each side of the equation. -0.06172839506 + 0.3333333333x + 0.06172839506 + x2 = 0 + 0.06172839506 Reorder the terms: -0.06172839506 + 0.06172839506 + 0.3333333333x + x2 = 0 + 0.06172839506 Combine like terms: -0.06172839506 + 0.06172839506 = 0.00000000000 0.00000000000 + 0.3333333333x + x2 = 0 + 0.06172839506 0.3333333333x + x2 = 0 + 0.06172839506 Combine like terms: 0 + 0.06172839506 = 0.06172839506 0.3333333333x + x2 = 0.06172839506 The x term is 0.3333333333x. Take half its coefficient (0.1666666667). Square it (0.02777777779) and add it to both sides. Add '0.02777777779' to each side of the equation. 0.3333333333x + 0.02777777779 + x2 = 0.06172839506 + 0.02777777779 Reorder the terms: 0.02777777779 + 0.3333333333x + x2 = 0.06172839506 + 0.02777777779 Combine like terms: 0.06172839506 + 0.02777777779 = 0.08950617285 0.02777777779 + 0.3333333333x + x2 = 0.08950617285 Factor a perfect square on the left side: (x + 0.1666666667)(x + 0.1666666667) = 0.08950617285 Calculate the square root of the right side: 0.299175823 Break this problem into two subproblems by setting (x + 0.1666666667) equal to 0.299175823 and -0.299175823.Subproblem 1
x + 0.1666666667 = 0.299175823 Simplifying x + 0.1666666667 = 0.299175823 Reorder the terms: 0.1666666667 + x = 0.299175823 Solving 0.1666666667 + x = 0.299175823 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + x = 0.299175823 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + x = 0.299175823 + -0.1666666667 x = 0.299175823 + -0.1666666667 Combine like terms: 0.299175823 + -0.1666666667 = 0.1325091563 x = 0.1325091563 Simplifying x = 0.1325091563Subproblem 2
x + 0.1666666667 = -0.299175823 Simplifying x + 0.1666666667 = -0.299175823 Reorder the terms: 0.1666666667 + x = -0.299175823 Solving 0.1666666667 + x = -0.299175823 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.1666666667' to each side of the equation. 0.1666666667 + -0.1666666667 + x = -0.299175823 + -0.1666666667 Combine like terms: 0.1666666667 + -0.1666666667 = 0.0000000000 0.0000000000 + x = -0.299175823 + -0.1666666667 x = -0.299175823 + -0.1666666667 Combine like terms: -0.299175823 + -0.1666666667 = -0.4658424897 x = -0.4658424897 Simplifying x = -0.4658424897Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.1325091563, -0.4658424897}
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