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Simplifying 4a2 + -11a + -2 = 0 Reorder the terms: -2 + -11a + 4a2 = 0 Solving -2 + -11a + 4a2 = 0 Solving for variable 'a'. Begin completing the square. Divide all terms by 4 the coefficient of the squared term: Divide each side by '4'. -0.5 + -2.75a + a2 = 0 Move the constant term to the right: Add '0.5' to each side of the equation. -0.5 + -2.75a + 0.5 + a2 = 0 + 0.5 Reorder the terms: -0.5 + 0.5 + -2.75a + a2 = 0 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + -2.75a + a2 = 0 + 0.5 -2.75a + a2 = 0 + 0.5 Combine like terms: 0 + 0.5 = 0.5 -2.75a + a2 = 0.5 The a term is -2.75a. Take half its coefficient (-1.375). Square it (1.890625) and add it to both sides. Add '1.890625' to each side of the equation. -2.75a + 1.890625 + a2 = 0.5 + 1.890625 Reorder the terms: 1.890625 + -2.75a + a2 = 0.5 + 1.890625 Combine like terms: 0.5 + 1.890625 = 2.390625 1.890625 + -2.75a + a2 = 2.390625 Factor a perfect square on the left side: (a + -1.375)(a + -1.375) = 2.390625 Calculate the square root of the right side: 1.54616461 Break this problem into two subproblems by setting (a + -1.375) equal to 1.54616461 and -1.54616461.Subproblem 1
a + -1.375 = 1.54616461 Simplifying a + -1.375 = 1.54616461 Reorder the terms: -1.375 + a = 1.54616461 Solving -1.375 + a = 1.54616461 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + a = 1.54616461 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + a = 1.54616461 + 1.375 a = 1.54616461 + 1.375 Combine like terms: 1.54616461 + 1.375 = 2.92116461 a = 2.92116461 Simplifying a = 2.92116461Subproblem 2
a + -1.375 = -1.54616461 Simplifying a + -1.375 = -1.54616461 Reorder the terms: -1.375 + a = -1.54616461 Solving -1.375 + a = -1.54616461 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '1.375' to each side of the equation. -1.375 + 1.375 + a = -1.54616461 + 1.375 Combine like terms: -1.375 + 1.375 = 0.000 0.000 + a = -1.54616461 + 1.375 a = -1.54616461 + 1.375 Combine like terms: -1.54616461 + 1.375 = -0.17116461 a = -0.17116461 Simplifying a = -0.17116461Solution
The solution to the problem is based on the solutions from the subproblems. a = {2.92116461, -0.17116461}
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