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Simplifying 2a2 + -2 = -2a Reorder the terms: -2 + 2a2 = -2a Solving -2 + 2a2 = -2a Solving for variable 'a'. Reorder the terms: -2 + 2a + 2a2 = -2a + 2a Combine like terms: -2a + 2a = 0 -2 + 2a + 2a2 = 0 Factor out the Greatest Common Factor (GCF), '2'. 2(-1 + a + a2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(-1 + a + a2)' equal to zero and attempt to solve: Simplifying -1 + a + a2 = 0 Solving -1 + a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + a + 1 + a2 = 0 + 1 Reorder the terms: -1 + 1 + a + a2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + a + a2 = 0 + 1 a + a2 = 0 + 1 Combine like terms: 0 + 1 = 1 a + a2 = 1 The a term is a. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. a + 0.25 + a2 = 1 + 0.25 Reorder the terms: 0.25 + a + a2 = 1 + 0.25 Combine like terms: 1 + 0.25 = 1.25 0.25 + a + a2 = 1.25 Factor a perfect square on the left side: (a + 0.5)(a + 0.5) = 1.25 Calculate the square root of the right side: 1.118033989 Break this problem into two subproblems by setting (a + 0.5) equal to 1.118033989 and -1.118033989.Subproblem 1
a + 0.5 = 1.118033989 Simplifying a + 0.5 = 1.118033989 Reorder the terms: 0.5 + a = 1.118033989 Solving 0.5 + a = 1.118033989 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + a = 1.118033989 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = 1.118033989 + -0.5 a = 1.118033989 + -0.5 Combine like terms: 1.118033989 + -0.5 = 0.618033989 a = 0.618033989 Simplifying a = 0.618033989Subproblem 2
a + 0.5 = -1.118033989 Simplifying a + 0.5 = -1.118033989 Reorder the terms: 0.5 + a = -1.118033989 Solving 0.5 + a = -1.118033989 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + a = -1.118033989 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = -1.118033989 + -0.5 a = -1.118033989 + -0.5 Combine like terms: -1.118033989 + -0.5 = -1.618033989 a = -1.618033989 Simplifying a = -1.618033989Solution
The solution to the problem is based on the solutions from the subproblems. a = {0.618033989, -1.618033989}Solution
a = {0.618033989, -1.618033989}
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