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Simplifying 3x(x + -3) + 11 = 2(x + 5) Reorder the terms: 3x(-3 + x) + 11 = 2(x + 5) (-3 * 3x + x * 3x) + 11 = 2(x + 5) (-9x + 3x2) + 11 = 2(x + 5) Reorder the terms: 11 + -9x + 3x2 = 2(x + 5) Reorder the terms: 11 + -9x + 3x2 = 2(5 + x) 11 + -9x + 3x2 = (5 * 2 + x * 2) 11 + -9x + 3x2 = (10 + 2x) Solving 11 + -9x + 3x2 = 10 + 2x Solving for variable 'x'. Reorder the terms: 11 + -10 + -9x + -2x + 3x2 = 10 + 2x + -10 + -2x Combine like terms: 11 + -10 = 1 1 + -9x + -2x + 3x2 = 10 + 2x + -10 + -2x Combine like terms: -9x + -2x = -11x 1 + -11x + 3x2 = 10 + 2x + -10 + -2x Reorder the terms: 1 + -11x + 3x2 = 10 + -10 + 2x + -2x Combine like terms: 10 + -10 = 0 1 + -11x + 3x2 = 0 + 2x + -2x 1 + -11x + 3x2 = 2x + -2x Combine like terms: 2x + -2x = 0 1 + -11x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 0.3333333333 + -3.666666667x + x2 = 0 Move the constant term to the right: Add '-0.3333333333' to each side of the equation. 0.3333333333 + -3.666666667x + -0.3333333333 + x2 = 0 + -0.3333333333 Reorder the terms: 0.3333333333 + -0.3333333333 + -3.666666667x + x2 = 0 + -0.3333333333 Combine like terms: 0.3333333333 + -0.3333333333 = 0.0000000000 0.0000000000 + -3.666666667x + x2 = 0 + -0.3333333333 -3.666666667x + x2 = 0 + -0.3333333333 Combine like terms: 0 + -0.3333333333 = -0.3333333333 -3.666666667x + x2 = -0.3333333333 The x term is -3.666666667x. Take half its coefficient (-1.833333334). Square it (3.361111114) and add it to both sides. Add '3.361111114' to each side of the equation. -3.666666667x + 3.361111114 + x2 = -0.3333333333 + 3.361111114 Reorder the terms: 3.361111114 + -3.666666667x + x2 = -0.3333333333 + 3.361111114 Combine like terms: -0.3333333333 + 3.361111114 = 3.0277777807 3.361111114 + -3.666666667x + x2 = 3.0277777807 Factor a perfect square on the left side: (x + -1.833333334)(x + -1.833333334) = 3.0277777807 Calculate the square root of the right side: 1.740051086 Break this problem into two subproblems by setting (x + -1.833333334) equal to 1.740051086 and -1.740051086.Subproblem 1
x + -1.833333334 = 1.740051086 Simplifying x + -1.833333334 = 1.740051086 Reorder the terms: -1.833333334 + x = 1.740051086 Solving -1.833333334 + x = 1.740051086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = 1.740051086 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = 1.740051086 + 1.833333334 x = 1.740051086 + 1.833333334 Combine like terms: 1.740051086 + 1.833333334 = 3.57338442 x = 3.57338442 Simplifying x = 3.57338442Subproblem 2
x + -1.833333334 = -1.740051086 Simplifying x + -1.833333334 = -1.740051086 Reorder the terms: -1.833333334 + x = -1.740051086 Solving -1.833333334 + x = -1.740051086 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.833333334' to each side of the equation. -1.833333334 + 1.833333334 + x = -1.740051086 + 1.833333334 Combine like terms: -1.833333334 + 1.833333334 = 0.000000000 0.000000000 + x = -1.740051086 + 1.833333334 x = -1.740051086 + 1.833333334 Combine like terms: -1.740051086 + 1.833333334 = 0.093282248 x = 0.093282248 Simplifying x = 0.093282248Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.57338442, 0.093282248}
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