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Simplifying -4a + 4 = a2 Reorder the terms: 4 + -4a = a2 Solving 4 + -4a = a2 Solving for variable 'a'. Combine like terms: a2 + -1a2 = 0 4 + -4a + -1a2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -4 + 4a + a2 = 0 Move the constant term to the right: Add '4' to each side of the equation. -4 + 4a + 4 + a2 = 0 + 4 Reorder the terms: -4 + 4 + 4a + a2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 4a + a2 = 0 + 4 4a + a2 = 0 + 4 Combine like terms: 0 + 4 = 4 4a + a2 = 4 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 = 4 + 4 Reorder the terms: 4 + 4a + a2 = 4 + 4 Combine like terms: 4 + 4 = 8 4 + 4a + a2 = 8 Factor a perfect square on the left side: (a + 2)(a + 2) = 8 Calculate the square root of the right side: 2.828427125 Break this problem into two subproblems by setting (a + 2) equal to 2.828427125 and -2.828427125.Subproblem 1
a + 2 = 2.828427125 Simplifying a + 2 = 2.828427125 Reorder the terms: 2 + a = 2.828427125 Solving 2 + a = 2.828427125 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 = 2.828427125 + -2 Combine like terms: 2 + -2 = 0 0 + a = 2.828427125 + -2 a = 2.828427125 + -2 Combine like terms: 2.828427125 + -2 = 0.828427125 a = 0.828427125 Simplifying a = 0.828427125Subproblem 2
a + 2 = -2.828427125 Simplifying a + 2 = -2.828427125 Reorder the terms: 2 + a = -2.828427125 Solving 2 + a = -2.828427125 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 = -2.828427125 + -2 Combine like terms: 2 + -2 = 0 0 + a = -2.828427125 + -2 a = -2.828427125 + -2 Combine like terms: -2.828427125 + -2 = -4.828427125 a = -4.828427125 Simplifying a = -4.828427125Solution
The solution to the problem is based on the solutions from the subproblems. a = {0.828427125, -4.828427125}
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