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Simplifying a2 + 4a + 4 = 5 Reorder the terms: 4 + 4a + a2 = 5 Solving 4 + 4a + a2 = 5 Solving for variable 'a'. Reorder the terms: 4 + -5 + 4a + a2 = 5 + -5 Combine like terms: 4 + -5 = -1 -1 + 4a + a2 = 5 + -5 Combine like terms: 5 + -5 = 0 -1 + 4a + a2 = 0 Begin completing the square. Move the constant term to the right: Add '1' to each side of the equation. -1 + 4a + 1 + a2 = 0 + 1 Reorder the terms: -1 + 1 + 4a + a2 = 0 + 1 Combine like terms: -1 + 1 = 0 0 + 4a + a2 = 0 + 1 4a + a2 = 0 + 1 Combine like terms: 0 + 1 = 1 4a + a2 = 1 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 = 1 + 4 Reorder the terms: 4 + 4a + a2 = 1 + 4 Combine like terms: 1 + 4 = 5 4 + 4a + a2 = 5 Factor a perfect square on the left side: (a + 2)(a + 2) = 5 Calculate the square root of the right side: 2.236067978 Break this problem into two subproblems by setting (a + 2) equal to 2.236067978 and -2.236067978.Subproblem 1
a + 2 = 2.236067978 Simplifying a + 2 = 2.236067978 Reorder the terms: 2 + a = 2.236067978 Solving 2 + a = 2.236067978 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 = 2.236067978 + -2 Combine like terms: 2 + -2 = 0 0 + a = 2.236067978 + -2 a = 2.236067978 + -2 Combine like terms: 2.236067978 + -2 = 0.236067978 a = 0.236067978 Simplifying a = 0.236067978Subproblem 2
a + 2 = -2.236067978 Simplifying a + 2 = -2.236067978 Reorder the terms: 2 + a = -2.236067978 Solving 2 + a = -2.236067978 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 = -2.236067978 + -2 Combine like terms: 2 + -2 = 0 0 + a = -2.236067978 + -2 a = -2.236067978 + -2 Combine like terms: -2.236067978 + -2 = -4.236067978 a = -4.236067978 Simplifying a = -4.236067978Solution
The solution to the problem is based on the solutions from the subproblems. a = {0.236067978, -4.236067978}
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