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Simplifying 8x2 + -12x + -11 = 0 Reorder the terms: -11 + -12x + 8x2 = 0 Solving -11 + -12x + 8x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 8 the coefficient of the squared term: Divide each side by '8'. -1.375 + -1.5x + x2 = 0 Move the constant term to the right: Add '1.375' to each side of the equation. -1.375 + -1.5x + 1.375 + x2 = 0 + 1.375 Reorder the terms: -1.375 + 1.375 + -1.5x + x2 = 0 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + -1.5x + x2 = 0 + 1.375 -1.5x + x2 = 0 + 1.375 Combine like terms: 0 + 1.375 = 1.375 -1.5x + x2 = 1.375 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 = 1.375 + 0.5625 Reorder the terms: 0.5625 + -1.5x + x2 = 1.375 + 0.5625 Combine like terms: 1.375 + 0.5625 = 1.9375 0.5625 + -1.5x + x2 = 1.9375 Factor a perfect square on the left side: (x + -0.75)(x + -0.75) = 1.9375 Calculate the square root of the right side: 1.391941091 Break this problem into two subproblems by setting (x + -0.75) equal to 1.391941091 and -1.391941091.Subproblem 1
x + -0.75 = 1.391941091 Simplifying x + -0.75 = 1.391941091 Reorder the terms: -0.75 + x = 1.391941091 Solving -0.75 + x = 1.391941091 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 = 1.391941091 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = 1.391941091 + 0.75 x = 1.391941091 + 0.75 Combine like terms: 1.391941091 + 0.75 = 2.141941091 x = 2.141941091 Simplifying x = 2.141941091Subproblem 2
x + -0.75 = -1.391941091 Simplifying x + -0.75 = -1.391941091 Reorder the terms: -0.75 + x = -1.391941091 Solving -0.75 + x = -1.391941091 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 = -1.391941091 + 0.75 Combine like terms: -0.75 + 0.75 = 0.00 0.00 + x = -1.391941091 + 0.75 x = -1.391941091 + 0.75 Combine like terms: -1.391941091 + 0.75 = -0.641941091 x = -0.641941091 Simplifying x = -0.641941091Solution
The solution to the problem is based on the solutions from the subproblems. x = {2.141941091, -0.641941091}
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