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Simplifying a2 + 3a + -27 = 0 Reorder the terms: -27 + 3a + a2 = 0 Solving -27 + 3a + a2 = 0 Solving for variable 'a'. Begin completing the square. Move the constant term to the right: Add '27' to each side of the equation. -27 + 3a + 27 + a2 = 0 + 27 Reorder the terms: -27 + 27 + 3a + a2 = 0 + 27 Combine like terms: -27 + 27 = 0 0 + 3a + a2 = 0 + 27 3a + a2 = 0 + 27 Combine like terms: 0 + 27 = 27 3a + a2 = 27 The a term is 3a. Take half its coefficient (1.5). Square it (2.25) and add it to both sides. Add '2.25' to each side of the equation. 3a + 2.25 + a2 = 27 + 2.25 Reorder the terms: 2.25 + 3a + a2 = 27 + 2.25 Combine like terms: 27 + 2.25 = 29.25 2.25 + 3a + a2 = 29.25 Factor a perfect square on the left side: (a + 1.5)(a + 1.5) = 29.25 Calculate the square root of the right side: 5.408326913 Break this problem into two subproblems by setting (a + 1.5) equal to 5.408326913 and -5.408326913.Subproblem 1
a + 1.5 = 5.408326913 Simplifying a + 1.5 = 5.408326913 Reorder the terms: 1.5 + a = 5.408326913 Solving 1.5 + a = 5.408326913 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + a = 5.408326913 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + a = 5.408326913 + -1.5 a = 5.408326913 + -1.5 Combine like terms: 5.408326913 + -1.5 = 3.908326913 a = 3.908326913 Simplifying a = 3.908326913Subproblem 2
a + 1.5 = -5.408326913 Simplifying a + 1.5 = -5.408326913 Reorder the terms: 1.5 + a = -5.408326913 Solving 1.5 + a = -5.408326913 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + a = -5.408326913 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + a = -5.408326913 + -1.5 a = -5.408326913 + -1.5 Combine like terms: -5.408326913 + -1.5 = -6.908326913 a = -6.908326913 Simplifying a = -6.908326913Solution
The solution to the problem is based on the solutions from the subproblems. a = {3.908326913, -6.908326913}
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