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Simplifying 20 + -1x2 = -5x Solving 20 + -1x2 = -5x Solving for variable 'x'. Reorder the terms: 20 + 5x + -1x2 = -5x + 5x Combine like terms: -5x + 5x = 0 20 + 5x + -1x2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -20 + -5x + x2 = 0 Move the constant term to the right: Add '20' to each side of the equation. -20 + -5x + 20 + x2 = 0 + 20 Reorder the terms: -20 + 20 + -5x + x2 = 0 + 20 Combine like terms: -20 + 20 = 0 0 + -5x + x2 = 0 + 20 -5x + x2 = 0 + 20 Combine like terms: 0 + 20 = 20 -5x + x2 = 20 The x term is -5x. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5x + 6.25 + x2 = 20 + 6.25 Reorder the terms: 6.25 + -5x + x2 = 20 + 6.25 Combine like terms: 20 + 6.25 = 26.25 6.25 + -5x + x2 = 26.25 Factor a perfect square on the left side: (x + -2.5)(x + -2.5) = 26.25 Calculate the square root of the right side: 5.123475383 Break this problem into two subproblems by setting (x + -2.5) equal to 5.123475383 and -5.123475383.Subproblem 1
x + -2.5 = 5.123475383 Simplifying x + -2.5 = 5.123475383 Reorder the terms: -2.5 + x = 5.123475383 Solving -2.5 + x = 5.123475383 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = 5.123475383 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = 5.123475383 + 2.5 x = 5.123475383 + 2.5 Combine like terms: 5.123475383 + 2.5 = 7.623475383 x = 7.623475383 Simplifying x = 7.623475383Subproblem 2
x + -2.5 = -5.123475383 Simplifying x + -2.5 = -5.123475383 Reorder the terms: -2.5 + x = -5.123475383 Solving -2.5 + x = -5.123475383 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + x = -5.123475383 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + x = -5.123475383 + 2.5 x = -5.123475383 + 2.5 Combine like terms: -5.123475383 + 2.5 = -2.623475383 x = -2.623475383 Simplifying x = -2.623475383Solution
The solution to the problem is based on the solutions from the subproblems. x = {7.623475383, -2.623475383}
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