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Simplifying 0 = -6x2 + 5x + 9 Reorder the terms: 0 = 9 + 5x + -6x2 Solving 0 = 9 + 5x + -6x2 Solving for variable 'x'. Combine like terms: 0 + -9 = -9 -9 + -5x + 6x2 = 9 + 5x + -6x2 + -9 + -5x + 6x2 Reorder the terms: -9 + -5x + 6x2 = 9 + -9 + 5x + -5x + -6x2 + 6x2 Combine like terms: 9 + -9 = 0 -9 + -5x + 6x2 = 0 + 5x + -5x + -6x2 + 6x2 -9 + -5x + 6x2 = 5x + -5x + -6x2 + 6x2 Combine like terms: 5x + -5x = 0 -9 + -5x + 6x2 = 0 + -6x2 + 6x2 -9 + -5x + 6x2 = -6x2 + 6x2 Combine like terms: -6x2 + 6x2 = 0 -9 + -5x + 6x2 = 0 Begin completing the square. Divide all terms by 6 the coefficient of the squared term: Divide each side by '6'. -1.5 + -0.8333333333x + x2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + -0.8333333333x + 1.5 + x2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + -0.8333333333x + x2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + -0.8333333333x + x2 = 0 + 1.5 -0.8333333333x + x2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 -0.8333333333x + x2 = 1.5 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 = 1.5 + 0.1736111111 Reorder the terms: 0.1736111111 + -0.8333333333x + x2 = 1.5 + 0.1736111111 Combine like terms: 1.5 + 0.1736111111 = 1.6736111111 0.1736111111 + -0.8333333333x + x2 = 1.6736111111 Factor a perfect square on the left side: (x + -0.4166666667)(x + -0.4166666667) = 1.6736111111 Calculate the square root of the right side: 1.293681225 Break this problem into two subproblems by setting (x + -0.4166666667) equal to 1.293681225 and -1.293681225.Subproblem 1
x + -0.4166666667 = 1.293681225 Simplifying x + -0.4166666667 = 1.293681225 Reorder the terms: -0.4166666667 + x = 1.293681225 Solving -0.4166666667 + x = 1.293681225 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 = 1.293681225 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x = 1.293681225 + 0.4166666667 x = 1.293681225 + 0.4166666667 Combine like terms: 1.293681225 + 0.4166666667 = 1.7103478917 x = 1.7103478917 Simplifying x = 1.7103478917Subproblem 2
x + -0.4166666667 = -1.293681225 Simplifying x + -0.4166666667 = -1.293681225 Reorder the terms: -0.4166666667 + x = -1.293681225 Solving -0.4166666667 + x = -1.293681225 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 = -1.293681225 + 0.4166666667 Combine like terms: -0.4166666667 + 0.4166666667 = 0.0000000000 0.0000000000 + x = -1.293681225 + 0.4166666667 x = -1.293681225 + 0.4166666667 Combine like terms: -1.293681225 + 0.4166666667 = -0.8770145583 x = -0.8770145583 Simplifying x = -0.8770145583Solution
The solution to the problem is based on the solutions from the subproblems. x = {1.7103478917, -0.8770145583}
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