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Simplifying x2 + -20x + -65 = 0 Reorder the terms: -65 + -20x + x2 = 0 Solving -65 + -20x + x2 = 0 Solving for variable 'x'. Begin completing the square. Move the constant term to the right: Add '65' to each side of the equation. -65 + -20x + 65 + x2 = 0 + 65 Reorder the terms: -65 + 65 + -20x + x2 = 0 + 65 Combine like terms: -65 + 65 = 0 0 + -20x + x2 = 0 + 65 -20x + x2 = 0 + 65 Combine like terms: 0 + 65 = 65 -20x + x2 = 65 The x term is -20x. Take half its coefficient (-10). Square it (100) and add it to both sides. Add '100' to each side of the equation. -20x + 100 + x2 = 65 + 100 Reorder the terms: 100 + -20x + x2 = 65 + 100 Combine like terms: 65 + 100 = 165 100 + -20x + x2 = 165 Factor a perfect square on the left side: (x + -10)(x + -10) = 165 Calculate the square root of the right side: 12.845232579 Break this problem into two subproblems by setting (x + -10) equal to 12.845232579 and -12.845232579.Subproblem 1
x + -10 = 12.845232579 Simplifying x + -10 = 12.845232579 Reorder the terms: -10 + x = 12.845232579 Solving -10 + x = 12.845232579 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = 12.845232579 + 10 Combine like terms: -10 + 10 = 0 0 + x = 12.845232579 + 10 x = 12.845232579 + 10 Combine like terms: 12.845232579 + 10 = 22.845232579 x = 22.845232579 Simplifying x = 22.845232579Subproblem 2
x + -10 = -12.845232579 Simplifying x + -10 = -12.845232579 Reorder the terms: -10 + x = -12.845232579 Solving -10 + x = -12.845232579 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + x = -12.845232579 + 10 Combine like terms: -10 + 10 = 0 0 + x = -12.845232579 + 10 x = -12.845232579 + 10 Combine like terms: -12.845232579 + 10 = -2.845232579 x = -2.845232579 Simplifying x = -2.845232579Solution
The solution to the problem is based on the solutions from the subproblems. x = {22.845232579, -2.845232579}
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