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Simplifying 2(a + -8) + 7 = 5(a + 2) * 3a + -19 Reorder the terms: 2(-8 + a) + 7 = 5(a + 2) * 3a + -19 (-8 * 2 + a * 2) + 7 = 5(a + 2) * 3a + -19 (-16 + 2a) + 7 = 5(a + 2) * 3a + -19 Reorder the terms: -16 + 7 + 2a = 5(a + 2) * 3a + -19 Combine like terms: -16 + 7 = -9 -9 + 2a = 5(a + 2) * 3a + -19 Reorder the terms: -9 + 2a = 5(2 + a) * 3a + -19 Reorder the terms for easier multiplication: -9 + 2a = 5 * 3a(2 + a) + -19 Multiply 5 * 3 -9 + 2a = 15a(2 + a) + -19 -9 + 2a = (2 * 15a + a * 15a) + -19 -9 + 2a = (30a + 15a2) + -19 Reorder the terms: -9 + 2a = -19 + 30a + 15a2 Solving -9 + 2a = -19 + 30a + 15a2 Solving for variable 'a'. Reorder the terms: -9 + 19 + 2a + -30a + -15a2 = -19 + 30a + 15a2 + 19 + -30a + -15a2 Combine like terms: -9 + 19 = 10 10 + 2a + -30a + -15a2 = -19 + 30a + 15a2 + 19 + -30a + -15a2 Combine like terms: 2a + -30a = -28a 10 + -28a + -15a2 = -19 + 30a + 15a2 + 19 + -30a + -15a2 Reorder the terms: 10 + -28a + -15a2 = -19 + 19 + 30a + -30a + 15a2 + -15a2 Combine like terms: -19 + 19 = 0 10 + -28a + -15a2 = 0 + 30a + -30a + 15a2 + -15a2 10 + -28a + -15a2 = 30a + -30a + 15a2 + -15a2 Combine like terms: 30a + -30a = 0 10 + -28a + -15a2 = 0 + 15a2 + -15a2 10 + -28a + -15a2 = 15a2 + -15a2 Combine like terms: 15a2 + -15a2 = 0 10 + -28a + -15a2 = 0 Begin completing the square. Divide all terms by -15 the coefficient of the squared term: Divide each side by '-15'. -0.6666666667 + 1.866666667a + a2 = 0 Move the constant term to the right: Add '0.6666666667' to each side of the equation. -0.6666666667 + 1.866666667a + 0.6666666667 + a2 = 0 + 0.6666666667 Reorder the terms: -0.6666666667 + 0.6666666667 + 1.866666667a + a2 = 0 + 0.6666666667 Combine like terms: -0.6666666667 + 0.6666666667 = 0.0000000000 0.0000000000 + 1.866666667a + a2 = 0 + 0.6666666667 1.866666667a + a2 = 0 + 0.6666666667 Combine like terms: 0 + 0.6666666667 = 0.6666666667 1.866666667a + a2 = 0.6666666667 The a term is 1.866666667a. Take half its coefficient (0.9333333335). Square it (0.8711111114) and add it to both sides. Add '0.8711111114' to each side of the equation. 1.866666667a + 0.8711111114 + a2 = 0.6666666667 + 0.8711111114 Reorder the terms: 0.8711111114 + 1.866666667a + a2 = 0.6666666667 + 0.8711111114 Combine like terms: 0.6666666667 + 0.8711111114 = 1.5377777781 0.8711111114 + 1.866666667a + a2 = 1.5377777781 Factor a perfect square on the left side: (a + 0.9333333335)(a + 0.9333333335) = 1.5377777781 Calculate the square root of the right side: 1.240071683 Break this problem into two subproblems by setting (a + 0.9333333335) equal to 1.240071683 and -1.240071683.Subproblem 1
a + 0.9333333335 = 1.240071683 Simplifying a + 0.9333333335 = 1.240071683 Reorder the terms: 0.9333333335 + a = 1.240071683 Solving 0.9333333335 + a = 1.240071683 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.9333333335' to each side of the equation. 0.9333333335 + -0.9333333335 + a = 1.240071683 + -0.9333333335 Combine like terms: 0.9333333335 + -0.9333333335 = 0.0000000000 0.0000000000 + a = 1.240071683 + -0.9333333335 a = 1.240071683 + -0.9333333335 Combine like terms: 1.240071683 + -0.9333333335 = 0.3067383495 a = 0.3067383495 Simplifying a = 0.3067383495Subproblem 2
a + 0.9333333335 = -1.240071683 Simplifying a + 0.9333333335 = -1.240071683 Reorder the terms: 0.9333333335 + a = -1.240071683 Solving 0.9333333335 + a = -1.240071683 Solving for variable 'a'. Move all terms containing a to the left, all other terms to the right. Add '-0.9333333335' to each side of the equation. 0.9333333335 + -0.9333333335 + a = -1.240071683 + -0.9333333335 Combine like terms: 0.9333333335 + -0.9333333335 = 0.0000000000 0.0000000000 + a = -1.240071683 + -0.9333333335 a = -1.240071683 + -0.9333333335 Combine like terms: -1.240071683 + -0.9333333335 = -2.1734050165 a = -2.1734050165 Simplifying a = -2.1734050165Solution
The solution to the problem is based on the solutions from the subproblems. a = {0.3067383495, -2.1734050165}
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