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Simplifying 4x2 + -31x + 45 = 0 Reorder the terms: 45 + -31x + 4x2 = 0 Solving 45 + -31x + 4x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. 11.25 + -7.75x + x2 = 0 Move the constant term to the right: Add '-11.25' to each side of the equation. 11.25 + -7.75x + -11.25 + x2 = 0 + -11.25 Reorder the terms: 11.25 + -11.25 + -7.75x + x2 = 0 + -11.25 Combine like terms: 11.25 + -11.25 = 0.00 0.00 + -7.75x + x2 = 0 + -11.25 -7.75x + x2 = 0 + -11.25 Combine like terms: 0 + -11.25 = -11.25 -7.75x + x2 = -11.25 The x term is -7.75x. Take half its coefficient (-3.875). Square it (15.015625) and add it to both sides. Add '15.015625' to each side of the equation. -7.75x + 15.015625 + x2 = -11.25 + 15.015625 Reorder the terms: 15.015625 + -7.75x + x2 = -11.25 + 15.015625 Combine like terms: -11.25 + 15.015625 = 3.765625 15.015625 + -7.75x + x2 = 3.765625 Factor a perfect square on the left side: (x + -3.875)(x + -3.875) = 3.765625 Calculate the square root of the right side: 1.940521837 Break this problem into two subproblems by setting (x + -3.875) equal to 1.940521837 and -1.940521837.Subproblem 1
x + -3.875 = 1.940521837 Simplifying x + -3.875 = 1.940521837 Reorder the terms: -3.875 + x = 1.940521837 Solving -3.875 + x = 1.940521837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.875' to each side of the equation. -3.875 + 3.875 + x = 1.940521837 + 3.875 Combine like terms: -3.875 + 3.875 = 0.000 0.000 + x = 1.940521837 + 3.875 x = 1.940521837 + 3.875 Combine like terms: 1.940521837 + 3.875 = 5.815521837 x = 5.815521837 Simplifying x = 5.815521837Subproblem 2
x + -3.875 = -1.940521837 Simplifying x + -3.875 = -1.940521837 Reorder the terms: -3.875 + x = -1.940521837 Solving -3.875 + x = -1.940521837 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3.875' to each side of the equation. -3.875 + 3.875 + x = -1.940521837 + 3.875 Combine like terms: -3.875 + 3.875 = 0.000 0.000 + x = -1.940521837 + 3.875 x = -1.940521837 + 3.875 Combine like terms: -1.940521837 + 3.875 = 1.934478163 x = 1.934478163 Simplifying x = 1.934478163Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.815521837, 1.934478163}
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