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Simplifying 9x(-5 + -6x) + -1.3 = 0 (-5 * 9x + -6x * 9x) + -1.3 = 0 (-45x + -54x2) + -1.3 = 0 Reorder the terms: -1.3 + -45x + -54x2 = 0 Solving -1.3 + -45x + -54x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by -54 the coefficient of the squared term: Divide each side by '-54'. 0.02407407407 + 0.8333333333x + x2 = 0 Move the constant term to the right: Add '-0.02407407407' to each side of the equation. 0.02407407407 + 0.8333333333x + -0.02407407407 + x2 = 0 + -0.02407407407 Reorder the terms: 0.02407407407 + -0.02407407407 + 0.8333333333x + x2 = 0 + -0.02407407407 Combine like terms: 0.02407407407 + -0.02407407407 = 0.00000000000 0.00000000000 + 0.8333333333x + x2 = 0 + -0.02407407407 0.8333333333x + x2 = 0 + -0.02407407407 Combine like terms: 0 + -0.02407407407 = -0.02407407407 0.8333333333x + x2 = -0.02407407407 The x term is 0.8333333333x. Take half its coefficient (0.4166666667). Square it (0.1736111111) and add it to both sides. Add '0.1736111111' to each side of the equation. 0.8333333333x + 0.1736111111 + x2 = -0.02407407407 + 0.1736111111 Reorder the terms: 0.1736111111 + 0.8333333333x + x2 = -0.02407407407 + 0.1736111111 Combine like terms: -0.02407407407 + 0.1736111111 = 0.14953703703 0.1736111111 + 0.8333333333x + x2 = 0.14953703703 Factor a perfect square on the left side: (x + 0.4166666667)(x + 0.4166666667) = 0.14953703703 Calculate the square root of the right side: 0.38670019 Break this problem into two subproblems by setting (x + 0.4166666667) equal to 0.38670019 and -0.38670019.Subproblem 1
x + 0.4166666667 = 0.38670019 Simplifying x + 0.4166666667 = 0.38670019 Reorder the terms: 0.4166666667 + x = 0.38670019 Solving 0.4166666667 + x = 0.38670019 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4166666667' to each side of the equation. 0.4166666667 + -0.4166666667 + x = 0.38670019 + -0.4166666667 Combine like terms: 0.4166666667 + -0.4166666667 = 0.0000000000 0.0000000000 + x = 0.38670019 + -0.4166666667 x = 0.38670019 + -0.4166666667 Combine like terms: 0.38670019 + -0.4166666667 = -0.0299664767 x = -0.0299664767 Simplifying x = -0.0299664767Subproblem 2
x + 0.4166666667 = -0.38670019 Simplifying x + 0.4166666667 = -0.38670019 Reorder the terms: 0.4166666667 + x = -0.38670019 Solving 0.4166666667 + x = -0.38670019 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.4166666667' to each side of the equation. 0.4166666667 + -0.4166666667 + x = -0.38670019 + -0.4166666667 Combine like terms: 0.4166666667 + -0.4166666667 = 0.0000000000 0.0000000000 + x = -0.38670019 + -0.4166666667 x = -0.38670019 + -0.4166666667 Combine like terms: -0.38670019 + -0.4166666667 = -0.8033668567 x = -0.8033668567 Simplifying x = -0.8033668567Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.0299664767, -0.8033668567}
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