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Simplifying 3x(x + -2) = 7 Reorder the terms: 3x(-2 + x) = 7 (-2 * 3x + x * 3x) = 7 (-6x + 3x2) = 7 Solving -6x + 3x2 = 7 Solving for variable 'x'. Reorder the terms: -7 + -6x + 3x2 = 7 + -7 Combine like terms: 7 + -7 = 0 -7 + -6x + 3x2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -2.333333333 + -2x + x2 = 0 Move the constant term to the right: Add '2.333333333' to each side of the equation. -2.333333333 + -2x + 2.333333333 + x2 = 0 + 2.333333333 Reorder the terms: -2.333333333 + 2.333333333 + -2x + x2 = 0 + 2.333333333 Combine like terms: -2.333333333 + 2.333333333 = 0.000000000 0.000000000 + -2x + x2 = 0 + 2.333333333 -2x + x2 = 0 + 2.333333333 Combine like terms: 0 + 2.333333333 = 2.333333333 -2x + x2 = 2.333333333 The x term is -2x. Take half its coefficient (-1). Square it (1) and add it to both sides. Add '1' to each side of the equation. -2x + 1 + x2 = 2.333333333 + 1 Reorder the terms: 1 + -2x + x2 = 2.333333333 + 1 Combine like terms: 2.333333333 + 1 = 3.333333333 1 + -2x + x2 = 3.333333333 Factor a perfect square on the left side: (x + -1)(x + -1) = 3.333333333 Calculate the square root of the right side: 1.825741858 Break this problem into two subproblems by setting (x + -1) equal to 1.825741858 and -1.825741858.Subproblem 1
x + -1 = 1.825741858 Simplifying x + -1 = 1.825741858 Reorder the terms: -1 + x = 1.825741858 Solving -1 + x = 1.825741858 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = 1.825741858 + 1 Combine like terms: -1 + 1 = 0 0 + x = 1.825741858 + 1 x = 1.825741858 + 1 Combine like terms: 1.825741858 + 1 = 2.825741858 x = 2.825741858 Simplifying x = 2.825741858Subproblem 2
x + -1 = -1.825741858 Simplifying x + -1 = -1.825741858 Reorder the terms: -1 + x = -1.825741858 Solving -1 + x = -1.825741858 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + x = -1.825741858 + 1 Combine like terms: -1 + 1 = 0 0 + x = -1.825741858 + 1 x = -1.825741858 + 1 Combine like terms: -1.825741858 + 1 = -0.825741858 x = -0.825741858 Simplifying x = -0.825741858Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.825741858, -0.825741858}
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