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Simplifying 3x2 + 12x + 7 + -5 = 0 Reorder the terms: 7 + -5 + 12x + 3x2 = 0 Combine like terms: 7 + -5 = 2 2 + 12x + 3x2 = 0 Solving 2 + 12x + 3x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. 0.6666666667 + 4x + x2 = 0 Move the constant term to the right: Add '-0.6666666667' to each side of the equation. 0.6666666667 + 4x + -0.6666666667 + x2 = 0 + -0.6666666667 Reorder the terms: 0.6666666667 + -0.6666666667 + 4x + x2 = 0 + -0.6666666667 Combine like terms: 0.6666666667 + -0.6666666667 = 0.0000000000 0.0000000000 + 4x + x2 = 0 + -0.6666666667 4x + x2 = 0 + -0.6666666667 Combine like terms: 0 + -0.6666666667 = -0.6666666667 4x + x2 = -0.6666666667 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 = -0.6666666667 + 4 Reorder the terms: 4 + 4x + x2 = -0.6666666667 + 4 Combine like terms: -0.6666666667 + 4 = 3.3333333333 4 + 4x + x2 = 3.3333333333 Factor a perfect square on the left side: (x + 2)(x + 2) = 3.3333333333 Calculate the square root of the right side: 1.825741858 Break this problem into two subproblems by setting (x + 2) equal to 1.825741858 and -1.825741858.Subproblem 1
x + 2 = 1.825741858 Simplifying x + 2 = 1.825741858 Reorder the terms: 2 + x = 1.825741858 Solving 2 + x = 1.825741858 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 = 1.825741858 + -2 Combine like terms: 2 + -2 = 0 0 + x = 1.825741858 + -2 x = 1.825741858 + -2 Combine like terms: 1.825741858 + -2 = -0.174258142 x = -0.174258142 Simplifying x = -0.174258142Subproblem 2
x + 2 = -1.825741858 Simplifying x + 2 = -1.825741858 Reorder the terms: 2 + x = -1.825741858 Solving 2 + x = -1.825741858 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 = -1.825741858 + -2 Combine like terms: 2 + -2 = 0 0 + x = -1.825741858 + -2 x = -1.825741858 + -2 Combine like terms: -1.825741858 + -2 = -3.825741858 x = -3.825741858 Simplifying x = -3.825741858Solution
The solution to the problem is based on the solutions from the subproblems. x = {-0.174258142, -3.825741858}
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