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Simplifying 11x2 + -31x + -54 = 0 Reorder the terms: -54 + -31x + 11x2 = 0 Solving -54 + -31x + 11x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 11 the coefficient of the squared term: Divide each side by '11'. -4.909090909 + -2.818181818x + x2 = 0 Move the constant term to the right: Add '4.909090909' to each side of the equation. -4.909090909 + -2.818181818x + 4.909090909 + x2 = 0 + 4.909090909 Reorder the terms: -4.909090909 + 4.909090909 + -2.818181818x + x2 = 0 + 4.909090909 Combine like terms: -4.909090909 + 4.909090909 = 0.000000000 0.000000000 + -2.818181818x + x2 = 0 + 4.909090909 -2.818181818x + x2 = 0 + 4.909090909 Combine like terms: 0 + 4.909090909 = 4.909090909 -2.818181818x + x2 = 4.909090909 The x term is -2.818181818x. Take half its coefficient (-1.409090909). Square it (1.985537190) and add it to both sides. Add '1.985537190' to each side of the equation. -2.818181818x + 1.985537190 + x2 = 4.909090909 + 1.985537190 Reorder the terms: 1.985537190 + -2.818181818x + x2 = 4.909090909 + 1.985537190 Combine like terms: 4.909090909 + 1.985537190 = 6.894628099 1.985537190 + -2.818181818x + x2 = 6.894628099 Factor a perfect square on the left side: (x + -1.409090909)(x + -1.409090909) = 6.894628099 Calculate the square root of the right side: 2.625762384 Break this problem into two subproblems by setting (x + -1.409090909) equal to 2.625762384 and -2.625762384.Subproblem 1
x + -1.409090909 = 2.625762384 Simplifying x + -1.409090909 = 2.625762384 Reorder the terms: -1.409090909 + x = 2.625762384 Solving -1.409090909 + x = 2.625762384 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.409090909' to each side of the equation. -1.409090909 + 1.409090909 + x = 2.625762384 + 1.409090909 Combine like terms: -1.409090909 + 1.409090909 = 0.000000000 0.000000000 + x = 2.625762384 + 1.409090909 x = 2.625762384 + 1.409090909 Combine like terms: 2.625762384 + 1.409090909 = 4.034853293 x = 4.034853293 Simplifying x = 4.034853293Subproblem 2
x + -1.409090909 = -2.625762384 Simplifying x + -1.409090909 = -2.625762384 Reorder the terms: -1.409090909 + x = -2.625762384 Solving -1.409090909 + x = -2.625762384 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '1.409090909' to each side of the equation. -1.409090909 + 1.409090909 + x = -2.625762384 + 1.409090909 Combine like terms: -1.409090909 + 1.409090909 = 0.000000000 0.000000000 + x = -2.625762384 + 1.409090909 x = -2.625762384 + 1.409090909 Combine like terms: -2.625762384 + 1.409090909 = -1.216671475 x = -1.216671475 Simplifying x = -1.216671475Solution
The solution to the problem is based on the solutions from the subproblems. x = {4.034853293, -1.216671475}
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