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Simplifying 3x2 + x + -5 = 0 Reorder the terms: -5 + x + 3x2 = 0 Solving -5 + x + 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'. -1.666666667 + 0.3333333333x + x2 = 0 Move the constant term to the right: Add '1.666666667' to each side of the equation. -1.666666667 + 0.3333333333x + 1.666666667 + x2 = 0 + 1.666666667 Reorder the terms: -1.666666667 + 1.666666667 + 0.3333333333x + x2 = 0 + 1.666666667 Combine like terms: -1.666666667 + 1.666666667 = 0.000000000 0.000000000 + 0.3333333333x + x2 = 0 + 1.666666667 0.3333333333x + x2 = 0 + 1.666666667 Combine like terms: 0 + 1.666666667 = 1.666666667 0.3333333333x + x2 = 1.666666667 The x term is x. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.3333333333x + 0.25 + x2 = 1.666666667 + 0.25 Reorder the terms: 0.25 + 0.3333333333x + x2 = 1.666666667 + 0.25 Combine like terms: 1.666666667 + 0.25 = 1.916666667 0.25 + 0.3333333333x + x2 = 1.916666667 Factor a perfect square on the left side: (x + 0.5)(x + 0.5) = 1.916666667 Calculate the square root of the right side: 1.384437311 Break this problem into two subproblems by setting (x + 0.5) equal to 1.384437311 and -1.384437311.Subproblem 1
x + 0.5 = 1.384437311 Simplifying x + 0.5 = 1.384437311 Reorder the terms: 0.5 + x = 1.384437311 Solving 0.5 + x = 1.384437311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = 1.384437311 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 1.384437311 + -0.5 x = 1.384437311 + -0.5 Combine like terms: 1.384437311 + -0.5 = 0.884437311 x = 0.884437311 Simplifying x = 0.884437311Subproblem 2
x + 0.5 = -1.384437311 Simplifying x + 0.5 = -1.384437311 Reorder the terms: 0.5 + x = -1.384437311 Solving 0.5 + x = -1.384437311 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + x = -1.384437311 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -1.384437311 + -0.5 x = -1.384437311 + -0.5 Combine like terms: -1.384437311 + -0.5 = -1.884437311 x = -1.884437311 Simplifying x = -1.884437311Solution
The solution to the problem is based on the solutions from the subproblems. x = {0.884437311, -1.884437311}
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