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Simplifying 9x2 + -7x = 3 Reorder the terms: -7x + 9x2 = 3 Solving -7x + 9x2 = 3 Solving for variable 'x'. Reorder the terms: -3 + -7x + 9x2 = 3 + -3 Combine like terms: 3 + -3 = 0 -3 + -7x + 9x2 = 0 Begin completing the square. Divide all terms by 9 the coefficient of the squared term: Divide each side by '9'. -0.3333333333 + -0.7777777778x + x2 = 0 Move the constant term to the right: Add '0.3333333333' to each side of the equation. -0.3333333333 + -0.7777777778x + 0.3333333333 + x2 = 0 + 0.3333333333 Reorder the terms: -0.3333333333 + 0.3333333333 + -0.7777777778x + x2 = 0 + 0.3333333333 Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000 0.0000000000 + -0.7777777778x + x2 = 0 + 0.3333333333 -0.7777777778x + x2 = 0 + 0.3333333333 Combine like terms: 0 + 0.3333333333 = 0.3333333333 -0.7777777778x + x2 = 0.3333333333 The x term is -0.7777777778x. Take half its coefficient (-0.3888888889). Square it (0.1512345679) and add it to both sides. Add '0.1512345679' to each side of the equation. -0.7777777778x + 0.1512345679 + x2 = 0.3333333333 + 0.1512345679 Reorder the terms: 0.1512345679 + -0.7777777778x + x2 = 0.3333333333 + 0.1512345679 Combine like terms: 0.3333333333 + 0.1512345679 = 0.4845679012 0.1512345679 + -0.7777777778x + x2 = 0.4845679012 Factor a perfect square on the left side: (x + -0.3888888889)(x + -0.3888888889) = 0.4845679012 Calculate the square root of the right side: 0.696109116 Break this problem into two subproblems by setting (x + -0.3888888889) equal to 0.696109116 and -0.696109116.Subproblem 1
x + -0.3888888889 = 0.696109116 Simplifying x + -0.3888888889 = 0.696109116 Reorder the terms: -0.3888888889 + x = 0.696109116 Solving -0.3888888889 + x = 0.696109116 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3888888889' to each side of the equation. -0.3888888889 + 0.3888888889 + x = 0.696109116 + 0.3888888889 Combine like terms: -0.3888888889 + 0.3888888889 = 0.0000000000 0.0000000000 + x = 0.696109116 + 0.3888888889 x = 0.696109116 + 0.3888888889 Combine like terms: 0.696109116 + 0.3888888889 = 1.0849980049 x = 1.0849980049 Simplifying x = 1.0849980049Subproblem 2
x + -0.3888888889 = -0.696109116 Simplifying x + -0.3888888889 = -0.696109116 Reorder the terms: -0.3888888889 + x = -0.696109116 Solving -0.3888888889 + x = -0.696109116 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.3888888889' to each side of the equation. -0.3888888889 + 0.3888888889 + x = -0.696109116 + 0.3888888889 Combine like terms: -0.3888888889 + 0.3888888889 = 0.0000000000 0.0000000000 + x = -0.696109116 + 0.3888888889 x = -0.696109116 + 0.3888888889 Combine like terms: -0.696109116 + 0.3888888889 = -0.3072202271 x = -0.3072202271 Simplifying x = -0.3072202271Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.0849980049, -0.3072202271}
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