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Simplifying 3x2 + -1[7x + -1(4x + -1x2) + 3] = 0 3x2 + -1[7x + (4x * -1 + -1x2 * -1) + 3] = 0 3x2 + -1[7x + (-4x + 1x2) + 3] = 0 Reorder the terms: 3x2 + -1[3 + 7x + -4x + 1x2] = 0 Combine like terms: 7x + -4x = 3x 3x2 + -1[3 + 3x + 1x2] = 0 3x2 + [3 * -1 + 3x * -1 + 1x2 * -1] = 0 3x2 + [-3 + -3x + -1x2] = 0 Reorder the terms: -3 + -3x + 3x2 + -1x2 = 0 Combine like terms: 3x2 + -1x2 = 2x2 -3 + -3x + 2x2 = 0 Solving -3 + -3x + 2x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -1.5 + -1.5x + x2 = 0 Move the constant term to the right: Add '1.5' to each side of the equation. -1.5 + -1.5x + 1.5 + x2 = 0 + 1.5 Reorder the terms: -1.5 + 1.5 + -1.5x + x2 = 0 + 1.5 Combine like terms: -1.5 + 1.5 = 0.0 0.0 + -1.5x + x2 = 0 + 1.5 -1.5x + x2 = 0 + 1.5 Combine like terms: 0 + 1.5 = 1.5 -1.5x + x2 = 1.5 The x term is -1.5x. Take half its coefficient (-0.75). Square it (0.5625) and add it to both sides. Add '0.5625' to each side of the equation. -1.5x + 0.5625 + x2 = 1.5 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = 1.5 + 0.5625 Combine like terms: 1.5 + 0.5625 = 2.0625 0.5625 + -1.5x + x2 = 2.0625 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = 2.0625 Calculate the square root of the right side: 1.436140662 Break this problem into two subproblems by setting (x + -0.75) equal to 1.436140662 and -1.436140662.Subproblem 1
x + -0.75 = 1.436140662 Simplifying x + -0.75 = 1.436140662 Reorder the terms: -0.75 + x = 1.436140662 Solving -0.75 + x = 1.436140662 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = 1.436140662 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 1.436140662 + 0.75 x = 1.436140662 + 0.75 Combine like terms: 1.436140662 + 0.75 = 2.186140662 x = 2.186140662 Simplifying x = 2.186140662Subproblem 2
x + -0.75 = -1.436140662 Simplifying x + -0.75 = -1.436140662 Reorder the terms: -0.75 + x = -1.436140662 Solving -0.75 + x = -1.436140662 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.75' to each side of the equation. -0.75 + 0.75 + x = -1.436140662 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -1.436140662 + 0.75 x = -1.436140662 + 0.75 Combine like terms: -1.436140662 + 0.75 = -0.686140662 x = -0.686140662 Simplifying x = -0.686140662Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.186140662, -0.686140662}
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