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Simplifying a * a + -4a = 23 Multiply a * a a2 + -4a = 23 Reorder the terms: -4a + a2 = 23 Solving -4a + a2 = 23 Solving for variable 'a'. Reorder the terms: -23 + -4a + a2 = 23 + -23 Combine like terms: 23 + -23 = 0 -23 + -4a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '23' to each side of the equation. -23 + -4a + 23 + a2 = 0 + 23 Reorder the terms: -23 + 23 + -4a + a2 = 0 + 23 Combine like terms: -23 + 23 = 0 0 + -4a + a2 = 0 + 23 -4a + a2 = 0 + 23 Combine like terms: 0 + 23 = 23 -4a + a2 = 23 The a term is -4a. Take half its coefficient (-2). Square it (4) and add it to both sides. Add '4' to each side of the equation. -4a + 4 + a2 = 23 + 4 Reorder the terms: 4 + -4a + a2 = 23 + 4 Combine like terms: 23 + 4 = 27 4 + -4a + a2 = 27 Factor a perfect square on the left side: (a + -2)(a + -2) = 27 Calculate the square root of the right side: 5.196152423 Break this problem into two subproblems by setting (a + -2) equal to 5.196152423 and -5.196152423.Subproblem 1
a + -2 = 5.196152423 Simplifying a + -2 = 5.196152423 Reorder the terms: -2 + a = 5.196152423 Solving -2 + a = 5.196152423 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + a = 5.196152423 + 2 Combine like terms: -2 + 2 = 0 0 + a = 5.196152423 + 2 a = 5.196152423 + 2 Combine like terms: 5.196152423 + 2 = 7.196152423 a = 7.196152423 Simplifying a = 7.196152423Subproblem 2
a + -2 = -5.196152423 Simplifying a + -2 = -5.196152423 Reorder the terms: -2 + a = -5.196152423 Solving -2 + a = -5.196152423 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '2' to each side of the equation. -2 + 2 + a = -5.196152423 + 2 Combine like terms: -2 + 2 = 0 0 + a = -5.196152423 + 2 a = -5.196152423 + 2 Combine like terms: -5.196152423 + 2 = -3.196152423 a = -3.196152423 Simplifying a = -3.196152423Solution
The solution to the problem is based on the solutions from the subproblems. a = {7.196152423, -3.196152423}
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