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Simplifying (7a + 8)(5a + 8) = 0 Reorder the terms: (8 + 7a)(5a + 8) = 0 Reorder the terms: (8 + 7a)(8 + 5a) = 0 Multiply (8 + 7a) * (8 + 5a) (8(8 + 5a) + 7a * (8 + 5a)) = 0 ((8 * 8 + 5a * 8) + 7a * (8 + 5a)) = 0 ((64 + 40a) + 7a * (8 + 5a)) = 0 (64 + 40a + (8 * 7a + 5a * 7a)) = 0 (64 + 40a + (56a + 35a2)) = 0 Combine like terms: 40a + 56a = 96a (64 + 96a + 35a2) = 0 Solving 64 + 96a + 35a2 = 0 Solving for variable 'a'. Factor a trinomial. (8 + 5a)(8 + 7a) = 0Subproblem 1
Set the factor '(8 + 5a)' equal to zero and attempt to solve: Simplifying 8 + 5a = 0 Solving 8 + 5a = 0 Move all terms containing a to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 5a = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 5a = 0 + -8 5a = 0 + -8 Combine like terms: 0 + -8 = -8 5a = -8 Divide each side by '5'. a = -1.6 Simplifying a = -1.6Subproblem 2
Set the factor '(8 + 7a)' equal to zero and attempt to solve: Simplifying 8 + 7a = 0 Solving 8 + 7a = 0 Move all terms containing a to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + 7a = 0 + -8 Combine like terms: 8 + -8 = 0 0 + 7a = 0 + -8 7a = 0 + -8 Combine like terms: 0 + -8 = -8 7a = -8 Divide each side by '7'. a = -1.142857143 Simplifying a = -1.142857143Solution
a = {-1.6, -1.142857143}
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