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Simplifying 2x + 3x(x + 4) = 12 Reorder the terms: 2x + 3x(4 + x) = 12 2x + (4 * 3x + x * 3x) = 12 2x + (12x + 3x2) = 12 Combine like terms: 2x + 12x = 14x 14x + 3x2 = 12 Solving 14x + 3x2 = 12 Solving for variable 'x'. Reorder the terms: -12 + 14x + 3x2 = 12 + -12 Combine like terms: 12 + -12 = 0 -12 + 14x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -4 + 4.666666667x + x2 = 0 Move the constant term to the right: Add '4' to each side of the equation. -4 + 4.666666667x + 4 + x2 = 0 + 4 Reorder the terms: -4 + 4 + 4.666666667x + x2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 4.666666667x + x2 = 0 + 4 4.666666667x + x2 = 0 + 4 Combine like terms: 0 + 4 = 4 4.666666667x + x2 = 4 The x term is 4.666666667x. Take half its coefficient (2.333333334). Square it (5.444444448) and add it to both sides. Add '5.444444448' to each side of the equation. 4.666666667x + 5.444444448 + x2 = 4 + 5.444444448 Reorder the terms: 5.444444448 + 4.666666667x + x2 = 4 + 5.444444448 Combine like terms: 4 + 5.444444448 = 9.444444448 5.444444448 + 4.666666667x + x2 = 9.444444448 Factor a perfect square on the left side: (x + 2.333333334)(x + 2.333333334) = 9.444444448 Calculate the square root of the right side: 3.073181486 Break this problem into two subproblems by setting (x + 2.333333334) equal to 3.073181486 and -3.073181486.Subproblem 1
x + 2.333333334 = 3.073181486 Simplifying x + 2.333333334 = 3.073181486 Reorder the terms: 2.333333334 + x = 3.073181486 Solving 2.333333334 + x = 3.073181486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.333333334' to each side of the equation. 2.333333334 + -2.333333334 + x = 3.073181486 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = 3.073181486 + -2.333333334 x = 3.073181486 + -2.333333334 Combine like terms: 3.073181486 + -2.333333334 = 0.739848152 x = 0.739848152 Simplifying x = 0.739848152Subproblem 2
x + 2.333333334 = -3.073181486 Simplifying x + 2.333333334 = -3.073181486 Reorder the terms: 2.333333334 + x = -3.073181486 Solving 2.333333334 + x = -3.073181486 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2.333333334' to each side of the equation. 2.333333334 + -2.333333334 + x = -3.073181486 + -2.333333334 Combine like terms: 2.333333334 + -2.333333334 = 0.000000000 0.000000000 + x = -3.073181486 + -2.333333334 x = -3.073181486 + -2.333333334 Combine like terms: -3.073181486 + -2.333333334 = -5.40651482 x = -5.40651482 Simplifying x = -5.40651482Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.739848152, -5.40651482}
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