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Simplifying -2a2 + 12a + 8 = 0 Reorder the terms: 8 + 12a + -2a2 = 0 Solving 8 + 12a + -2a2 = 0 Solving for variable 'a'. Factor out the Greatest Common Factor (GCF), '2'. 2(4 + 6a + -1a2) = 0 Ignore the factor 2.Subproblem 1
Set the factor '(4 + 6a + -1a2)' equal to zero and attempt to solve: Simplifying 4 + 6a + -1a2 = 0 Solving 4 + 6a + -1a2 = 0 Begin completing the square. Divide all terms by -1 the coefficient of the squared term: Divide each side by '-1'. -4 + -6a + a2 = 0 Move the constant term to the right: Add '4' to each side of the equation. -4 + -6a + 4 + a2 = 0 + 4 Reorder the terms: -4 + 4 + -6a + a2 = 0 + 4 Combine like terms: -4 + 4 = 0 0 + -6a + a2 = 0 + 4 -6a + a2 = 0 + 4 Combine like terms: 0 + 4 = 4 -6a + a2 = 4 The a term is -6a. Take half its coefficient (-3). Square it (9) and add it to both sides. Add '9' to each side of the equation. -6a + 9 + a2 = 4 + 9 Reorder the terms: 9 + -6a + a2 = 4 + 9 Combine like terms: 4 + 9 = 13 9 + -6a + a2 = 13 Factor a perfect square on the left side: (a + -3)(a + -3) = 13 Calculate the square root of the right side: 3.605551275 Break this problem into two subproblems by setting (a + -3) equal to 3.605551275 and -3.605551275.Subproblem 1
a + -3 = 3.605551275 Simplifying a + -3 = 3.605551275 Reorder the terms: -3 + a = 3.605551275 Solving -3 + a = 3.605551275 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + a = 3.605551275 + 3 Combine like terms: -3 + 3 = 0 0 + a = 3.605551275 + 3 a = 3.605551275 + 3 Combine like terms: 3.605551275 + 3 = 6.605551275 a = 6.605551275 Simplifying a = 6.605551275Subproblem 2
a + -3 = -3.605551275 Simplifying a + -3 = -3.605551275 Reorder the terms: -3 + a = -3.605551275 Solving -3 + a = -3.605551275 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + a = -3.605551275 + 3 Combine like terms: -3 + 3 = 0 0 + a = -3.605551275 + 3 a = -3.605551275 + 3 Combine like terms: -3.605551275 + 3 = -0.605551275 a = -0.605551275 Simplifying a = -0.605551275Solution
The solution to the problem is based on the solutions from the subproblems. a = {6.605551275, -0.605551275}Solution
a = {6.605551275, -0.605551275}
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