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Simplifying 2x2 + -3x + -8 = 8 Reorder the terms: -8 + -3x + 2x2 = 8 Solving -8 + -3x + 2x2 = 8 Solving for variable 'x'. Reorder the terms: -8 + -8 + -3x + 2x2 = 8 + -8 Combine like terms: -8 + -8 = -16 -16 + -3x + 2x2 = 8 + -8 Combine like terms: 8 + -8 = 0 -16 + -3x + 2x2 = 0 Begin completing the square. Divide all terms by 2 the coefficient of the squared term: Divide each side by '2'. -8 + -1.5x + x2 = 0 Move the constant term to the right: Add '8' to each side of the equation. -8 + -1.5x + 8 + x2 = 0 + 8 Reorder the terms: -8 + 8 + -1.5x + x2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + -1.5x + x2 = 0 + 8 -1.5x + x2 = 0 + 8 Combine like terms: 0 + 8 = 8 -1.5x + x2 = 8 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 = 8 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = 8 + 0.5625 Combine like terms: 8 + 0.5625 = 8.5625 0.5625 + -1.5x + x2 = 8.5625 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = 8.5625 Calculate the square root of the right side: 2.926174978 Break this problem into two subproblems by setting (x + -0.75) equal to 2.926174978 and -2.926174978.Subproblem 1
x + -0.75 = 2.926174978 Simplifying x + -0.75 = 2.926174978 Reorder the terms: -0.75 + x = 2.926174978 Solving -0.75 + x = 2.926174978 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 = 2.926174978 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 2.926174978 + 0.75 x = 2.926174978 + 0.75 Combine like terms: 2.926174978 + 0.75 = 3.676174978 x = 3.676174978 Simplifying x = 3.676174978Subproblem 2
x + -0.75 = -2.926174978 Simplifying x + -0.75 = -2.926174978 Reorder the terms: -0.75 + x = -2.926174978 Solving -0.75 + x = -2.926174978 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 = -2.926174978 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -2.926174978 + 0.75 x = -2.926174978 + 0.75 Combine like terms: -2.926174978 + 0.75 = -2.176174978 x = -2.176174978 Simplifying x = -2.176174978Solution
The solution to the problem is based on the solutions from the subproblems. x = {3.676174978, -2.176174978}
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