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Simplifying 5x2 + -9x + -89 = 0 Reorder the terms: -89 + -9x + 5x2 = 0 Solving -89 + -9x + 5x2 = 0 Solving for variable 'x'. Begin completing the square. Divide all terms by 5 the coefficient of the squared term: Divide each side by '5'. -17.8 + -1.8x + x2 = 0 Move the constant term to the right: Add '17.8' to each side of the equation. -17.8 + -1.8x + 17.8 + x2 = 0 + 17.8 Reorder the terms: -17.8 + 17.8 + -1.8x + x2 = 0 + 17.8 Combine like terms: -17.8 + 17.8 = 0.0 0.0 + -1.8x + x2 = 0 + 17.8 -1.8x + x2 = 0 + 17.8 Combine like terms: 0 + 17.8 = 17.8 -1.8x + x2 = 17.8 The x term is -1.8x. Take half its coefficient (-0.9). Square it (0.81) and add it to both sides. Add '0.81' to each side of the equation. -1.8x + 0.81 + x2 = 17.8 + 0.81 Reorder the terms: 0.81 + -1.8x + x2 = 17.8 + 0.81 Combine like terms: 17.8 + 0.81 = 18.61 0.81 + -1.8x + x2 = 18.61 Factor a perfect square on the left side: (x + -0.9)(x + -0.9) = 18.61 Calculate the square root of the right side: 4.313930922 Break this problem into two subproblems by setting (x + -0.9) equal to 4.313930922 and -4.313930922.Subproblem 1
x + -0.9 = 4.313930922 Simplifying x + -0.9 = 4.313930922 Reorder the terms: -0.9 + x = 4.313930922 Solving -0.9 + x = 4.313930922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + x = 4.313930922 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + x = 4.313930922 + 0.9 x = 4.313930922 + 0.9 Combine like terms: 4.313930922 + 0.9 = 5.213930922 x = 5.213930922 Simplifying x = 5.213930922Subproblem 2
x + -0.9 = -4.313930922 Simplifying x + -0.9 = -4.313930922 Reorder the terms: -0.9 + x = -4.313930922 Solving -0.9 + x = -4.313930922 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.9' to each side of the equation. -0.9 + 0.9 + x = -4.313930922 + 0.9 Combine like terms: -0.9 + 0.9 = 0.0 0.0 + x = -4.313930922 + 0.9 x = -4.313930922 + 0.9 Combine like terms: -4.313930922 + 0.9 = -3.413930922 x = -3.413930922 Simplifying x = -3.413930922Solution
The solution to the problem is based on the solutions from the subproblems. x = {5.213930922, -3.413930922}
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