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Simplifying A(A + -5) = 18 Reorder the terms: A(-5 + A) = 18 (-5 * A + A * A) = 18 (-5A + A2) = 18 Solving -5A + A2 = 18 Solving for variable 'A'. Reorder the terms: -18 + -5A + A2 = 18 + -18 Combine like terms: 18 + -18 = 0 -18 + -5A + A2 = 0 Begin completing the square. Move the constant term to the right: Add '18' to each side of the equation. -18 + -5A + 18 + A2 = 0 + 18 Reorder the terms: -18 + 18 + -5A + A2 = 0 + 18 Combine like terms: -18 + 18 = 0 0 + -5A + A2 = 0 + 18 -5A + A2 = 0 + 18 Combine like terms: 0 + 18 = 18 -5A + A2 = 18 The A term is -5A. 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. -5A + 6.25 + A2 = 18 + 6.25 Reorder the terms: 6.25 + -5A + A2 = 18 + 6.25 Combine like terms: 18 + 6.25 = 24.25 6.25 + -5A + A2 = 24.25 Factor a perfect square on the left side: (A + -2.5)(A + -2.5) = 24.25 Calculate the square root of the right side: 4.924428901 Break this problem into two subproblems by setting (A + -2.5) equal to 4.924428901 and -4.924428901.Subproblem 1
A + -2.5 = 4.924428901 Simplifying A + -2.5 = 4.924428901 Reorder the terms: -2.5 + A = 4.924428901 Solving -2.5 + A = 4.924428901 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + A = 4.924428901 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + A = 4.924428901 + 2.5 A = 4.924428901 + 2.5 Combine like terms: 4.924428901 + 2.5 = 7.424428901 A = 7.424428901 Simplifying A = 7.424428901Subproblem 2
A + -2.5 = -4.924428901 Simplifying A + -2.5 = -4.924428901 Reorder the terms: -2.5 + A = -4.924428901 Solving -2.5 + A = -4.924428901 Solving for variable 'A'. Move all terms containing A to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + A = -4.924428901 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + A = -4.924428901 + 2.5 A = -4.924428901 + 2.5 Combine like terms: -4.924428901 + 2.5 = -2.424428901 A = -2.424428901 Simplifying A = -2.424428901Solution
The solution to the problem is based on the solutions from the subproblems. A = {7.424428901, -2.424428901}
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