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Simplifying (7a2 + 7a + -2) + (8a2 + -2a + -3) = 0 Reorder the terms: (-2 + 7a + 7a2) + (8a2 + -2a + -3) = 0 Remove parenthesis around (-2 + 7a + 7a2) -2 + 7a + 7a2 + (8a2 + -2a + -3) = 0 Reorder the terms: -2 + 7a + 7a2 + (-3 + -2a + 8a2) = 0 Remove parenthesis around (-3 + -2a + 8a2) -2 + 7a + 7a2 + -3 + -2a + 8a2 = 0 Reorder the terms: -2 + -3 + 7a + -2a + 7a2 + 8a2 = 0 Combine like terms: -2 + -3 = -5 -5 + 7a + -2a + 7a2 + 8a2 = 0 Combine like terms: 7a + -2a = 5a -5 + 5a + 7a2 + 8a2 = 0 Combine like terms: 7a2 + 8a2 = 15a2 -5 + 5a + 15a2 = 0 Solving -5 + 5a + 15a2 = 0 Solving for variable 'a'. Factor out the Greatest Common Factor (GCF), '5'. 5(-1 + a + 3a2) = 0 Ignore the factor 5.Subproblem 1
Set the factor '(-1 + a + 3a2)' equal to zero and attempt to solve: Simplifying -1 + a + 3a2 = 0 Solving -1 + a + 3a2 = 0 Begin completing the square. Divide all terms by 3 the coefficient of the squared term: Divide each side by '3'. -0.3333333333 + 0.3333333333a + a2 = 0 Move the constant term to the right: Add '0.3333333333' to each side of the equation. -0.3333333333 + 0.3333333333a + 0.3333333333 + a2 = 0 + 0.3333333333 Reorder the terms: -0.3333333333 + 0.3333333333 + 0.3333333333a + a2 = 0 + 0.3333333333 Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000 0.0000000000 + 0.3333333333a + a2 = 0 + 0.3333333333 0.3333333333a + a2 = 0 + 0.3333333333 Combine like terms: 0 + 0.3333333333 = 0.3333333333 0.3333333333a + a2 = 0.3333333333 The a term is a. Take half its coefficient (0.5). Square it (0.25) and add it to both sides. Add '0.25' to each side of the equation. 0.3333333333a + 0.25 + a2 = 0.3333333333 + 0.25 Reorder the terms: 0.25 + 0.3333333333a + a2 = 0.3333333333 + 0.25 Combine like terms: 0.3333333333 + 0.25 = 0.5833333333 0.25 + 0.3333333333a + a2 = 0.5833333333 Factor a perfect square on the left side: (a + 0.5)(a + 0.5) = 0.5833333333 Calculate the square root of the right side: 0.763762616 Break this problem into two subproblems by setting (a + 0.5) equal to 0.763762616 and -0.763762616.Subproblem 1
a + 0.5 = 0.763762616 Simplifying a + 0.5 = 0.763762616 Reorder the terms: 0.5 + a = 0.763762616 Solving 0.5 + a = 0.763762616 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + a = 0.763762616 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = 0.763762616 + -0.5 a = 0.763762616 + -0.5 Combine like terms: 0.763762616 + -0.5 = 0.263762616 a = 0.263762616 Simplifying a = 0.263762616Subproblem 2
a + 0.5 = -0.763762616 Simplifying a + 0.5 = -0.763762616 Reorder the terms: 0.5 + a = -0.763762616 Solving 0.5 + a = -0.763762616 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + a = -0.763762616 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + a = -0.763762616 + -0.5 a = -0.763762616 + -0.5 Combine like terms: -0.763762616 + -0.5 = -1.263762616 a = -1.263762616 Simplifying a = -1.263762616Solution
The solution to the problem is based on the solutions from the subproblems. a = {0.263762616, -1.263762616}Solution
a = {0.263762616, -1.263762616}
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