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Simplifying 0.5a2 + a + -4 = 0 Reorder the terms: -4 + a + 0.5a2 = 0 Solving -4 + a + 0.5a2 = 0 Solving for variable 'a'. Begin completing the square. Divide all terms by 0.5 the coefficient of the squared term: Divide each side by '0.5'. -8 + 2a + a2 = 0 Move the constant term to the right: Add '8' to each side of the equation. -8 + 2a + 8 + a2 = 0 + 8 Reorder the terms: -8 + 8 + 2a + a2 = 0 + 8 Combine like terms: -8 + 8 = 0 0 + 2a + a2 = 0 + 8 2a + a2 = 0 + 8 Combine like terms: 0 + 8 = 8 2a + a2 = 8 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. 2a + 0.25 + a2 = 8 + 0.25 Reorder the terms: 0.25 + 2a + a2 = 8 + 0.25 Combine like terms: 8 + 0.25 = 8.25 0.25 + 2a + a2 = 8.25 Factor a perfect square on the left side: (a + 0.5)(a + 0.5) = 8.25 Calculate the square root of the right side: 2.872281323 Break this problem into two subproblems by setting (a + 0.5) equal to 2.872281323 and -2.872281323.Subproblem 1
a + 0.5 = 2.872281323 Simplifying a + 0.5 = 2.872281323 Reorder the terms: 0.5 + a = 2.872281323 Solving 0.5 + a = 2.872281323 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 = 2.872281323 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = 2.872281323 + -0.5 a = 2.872281323 + -0.5 Combine like terms: 2.872281323 + -0.5 = 2.372281323 a = 2.372281323 Simplifying a = 2.372281323Subproblem 2
a + 0.5 = -2.872281323 Simplifying a + 0.5 = -2.872281323 Reorder the terms: 0.5 + a = -2.872281323 Solving 0.5 + a = -2.872281323 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 = -2.872281323 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = -2.872281323 + -0.5 a = -2.872281323 + -0.5 Combine like terms: -2.872281323 + -0.5 = -3.372281323 a = -3.372281323 Simplifying a = -3.372281323Solution
The solution to the problem is based on the solutions from the subproblems. a = {2.372281323, -3.372281323}
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