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Simplifying 0 = 3x2 + 6x + -7 Reorder the terms: 0 = -7 + 6x + 3x2 Solving 0 = -7 + 6x + 3x2 Solving for variable 'x'. Combine like terms: 0 + 7 = 7 7 + -6x + -3x2 = -7 + 6x + 3x2 + 7 + -6x + -3x2 Reorder the terms: 7 + -6x + -3x2 = -7 + 7 + 6x + -6x + 3x2 + -3x2 Combine like terms: -7 + 7 = 0 7 + -6x + -3x2 = 0 + 6x + -6x + 3x2 + -3x2 7 + -6x + -3x2 = 6x + -6x + 3x2 + -3x2 Combine like terms: 6x + -6x = 0 7 + -6x + -3x2 = 0 + 3x2 + -3x2 7 + -6x + -3x2 = 3x2 + -3x2 Combine like terms: 3x2 + -3x2 = 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 = 0.825741858 x = 0.825741858 Simplifying x = 0.825741858Subproblem 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 = -2.825741858 x = -2.825741858 Simplifying x = -2.825741858Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.825741858, -2.825741858}
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