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Simplifying 3(x + 4) * x = 7 Reorder the terms: 3(4 + x) * x = 7 Reorder the terms for easier multiplication: 3x(4 + x) = 7 (4 * 3x + x * 3x) = 7 (12x + 3x2) = 7 Solving 12x + 3x2 = 7 Solving for variable 'x'. Reorder the terms: -7 + 12x + 3x2 = 7 + -7 Combine like terms: 7 + -7 = 0 -7 + 12x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -2.333333333 + 4x + x2 = 0 Move the constant term to the right: Add '2.333333333' to each side of the equation. -2.333333333 + 4x + 2.333333333 + x2 = 0 + 2.333333333 Reorder the terms: -2.333333333 + 2.333333333 + 4x + x2 = 0 + 2.333333333 Combine like terms: -2.333333333 + 2.333333333 = 0.000000000 0.000000000 + 4x + x2 = 0 + 2.333333333 4x + x2 = 0 + 2.333333333 Combine like terms: 0 + 2.333333333 = 2.333333333 4x + x2 = 2.333333333 The x term is 4x. Take half its coefficient (2). Square it (4) and add it to both sides. Add '4' to each side of the equation. 4x + 4 + x2 = 2.333333333 + 4 Reorder the terms: 4 + 4x + x2 = 2.333333333 + 4 Combine like terms: 2.333333333 + 4 = 6.333333333 4 + 4x + x2 = 6.333333333 Factor a perfect square on the left side: (x + 2)(x + 2) = 6.333333333 Calculate the square root of the right side: 2.516611478 Break this problem into two subproblems by setting (x + 2) equal to 2.516611478 and -2.516611478.Subproblem 1
x + 2 = 2.516611478 Simplifying x + 2 = 2.516611478 Reorder the terms: 2 + x = 2.516611478 Solving 2 + x = 2.516611478 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = 2.516611478 + -2 Combine like terms: 2 + -2 = 0 0 + x = 2.516611478 + -2 x = 2.516611478 + -2 Combine like terms: 2.516611478 + -2 = 0.516611478 x = 0.516611478 Simplifying x = 0.516611478Subproblem 2
x + 2 = -2.516611478 Simplifying x + 2 = -2.516611478 Reorder the terms: 2 + x = -2.516611478 Solving 2 + x = -2.516611478 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + x = -2.516611478 + -2 Combine like terms: 2 + -2 = 0 0 + x = -2.516611478 + -2 x = -2.516611478 + -2 Combine like terms: -2.516611478 + -2 = -4.516611478 x = -4.516611478 Simplifying x = -4.516611478Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.516611478, -4.516611478}
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